The team tackles the twisted murder case of Rhonda Richardson, who went searching for her lost dog and was later found seemingly scalped by a sadistic killer; the biggest twist is a new piece of evidence that breaks the case wide open.

Cameras capture stunned pedestrians running for cover as droplets of fire begin to rain down on the streets of St. Petersburg, Russia; experts investigate a network of nearby tram lines and the effect of a sudden lightning storm.

A grandmother catches a demon on a baby monitor; a man records footage of glistening rainbow UFO in California; mind-bending phenomena around the globe reveals a glitch in the matrix.

Jeff discusses how separation from his biological father and years of bullying fuelled his escalating drug use; the family of this promising auto body technician tries to intervene before crack cocaine crashes his career and life.

Things turn ugly inside a beauty salon for a veteran investigator and his team; a ghost hunter discovers that a remote island is alive with history; investigators unleash evil while investigating a historic home.

Wandering spirits seek to feed on the energy and emotions of unsuspecting patients and medical workers.

Sailing to Bell Island, Newfoundland, where the investigators reach out to the ghosts left by a devastating Nazi U-boat attack during WW II; descending into darkness as the trio reveals a group of ghostly miners trapped underground for 80 years.

After a letter requests its help, PRS investigates if a house caused an untimely death.

A couple believes the old farm they moved into is haunted.

Brett Ryan paves a long road of deception. The serial-lying ex-con hides his bank-robbing past from his fiancé and misleads his family, before a late-night confession to his mother leads to a murder no one could have seen coming.

Brett Ryan paves a long road of deception. The serial-lying ex-con hides his bank-robbing past from his fiancé and misleads his family, before a late-night confession to his mother leads to a murder no one could have seen coming.

A vacationing family films waves of fire breaking along the shores of an Indonesian island; experts investigate a possible connection to a classified WWII beach-burning weapon developed by the British to incinerate invading armies.

A man in Montana wonders what happened to a dead deer on his property until he sees the terrifying creature that may be responsible; a military airbase in Germany is visited by a UFO.

Dr. Small's tragic death is her husband's work.

Melissa's cocaine and vodka-fuelled rages has her family living in fear; a sexual assault experience has pushed Melissa into a cycle of addiction and underage prostitution that is threatening to end her life before she turns 20.

Triangle shaped hovering objects are seen by thousands of people and investigated by scientists and government officials, yet they could never be explained; the sightings occurred in a more than two year wave over Belgium, beginning in late 1989.

Whether surviving freezing temperatures, diving unfathomable depths in one breath, or lifting weighty objects, superhuman feats never cease to amaze; pulling them off could be a matter of training, willpower, genetics, or something more mysterious.

A man in Montana wonders what happened to a dead deer on his property until he sees the terrifying creature that may be responsible; a military airbase in Germany is visited by a UFO.

A vacationing family films waves of fire breaking along the shores of an Indonesian island; experts investigate a possible connection to a classified WWII beach-burning weapon developed by the British to incinerate invading armies.

Follows police investigators and forensic specialists across Australia as they battle the clock to find lost loved ones and bring them home.

Uncover signs of strangulation that implicate Lonnie after Micki's lifeless body washes up in Italy. Follow a trail of financial manoeuvres Lonnie made ahead of the couple's deadly cruise.

Kelly and Steve team up with the Anderson County Sheriff's Office to solve the horrific quadruple homicide of a family on Halloween; their investigation reveals a family feud, a trail of stolen cash, and a bloody shoe print left by the killer.

Follows police investigators and forensic specialists across Australia as they battle the clock to find lost loved ones and bring them home.

Uncover signs of strangulation that implicate Lonnie after Micki's lifeless body washes up in Italy. Follow a trail of financial manoeuvres Lonnie made ahead of the couple's deadly cruise.

A New Orleans socialite wrestles with her past.

Kelly and Steve investigate the brutal homicide of a beloved seminary student who was brutally hung and stabbed to death in the chapel restroom; their investigation reveals even more dark secrets and sinister deeds.

A vacationing family films waves of fire breaking along the shores of an Indonesian island; experts investigate a possible connection to a classified WWII beach-burning weapon developed by the British to incinerate invading armies.

A man in Montana wonders what happened to a dead deer on his property until he sees the terrifying creature that may be responsible; a military airbase in Germany is visited by a UFO.

Melissa's cocaine and vodka-fuelled rages has her family living in fear; a sexual assault experience has pushed Melissa into a cycle of addiction and underage prostitution that is threatening to end her life before she turns 20.

The coastal metropolis of Miami faces a triple threat of crumbling limestone bedrock, ferocious superstorms and relentless rising oceans.

Take a deep dive into watery enigmas; glide over a sunken Italian city; a unique underwater cemetery in the Florida Keys; a yellow brick road to nowhere in the depths of the North Pacific; puzzling rocky constructions off the coast of Australia.

Brett Ryan paves a long road of deception. The serial-lying ex-con hides his bank-robbing past from his fiancé and misleads his family, before a late-night confession to his mother leads to a murder no one could have seen coming.

Scratches appear on a woman's back spontaneously, but her credibility is in question.

An ex-boyfriend may spell supernatural revenge in the Pennsylvania Poconos.

Alex Heidbreder, a corrections officer at 200-year-old prison, gets an emergency call for a prisoner in severe distress and finds a prisoner frantically screaming for help; EMT Cory Carmichael rushes to help a man reportedly suffering from a seizure.

Childhood friends Ashley Taylor and Kevin Sweat reconnect as adults; Ashley's strange pre-wedding disappearance sheds light on Kevin's disturbing past and his connection to a string of unsolved murders.

A villager captures a moment of horror as a mysterious series of explosions lights up a mountainside in India; experts investigate a possible link to lost plutonium during a Cold War spy mission that went disastrously wrong.

A security guard catches a spirit wandering around a Kentucky whiskey distillery; paranormal investigators are met with bone-chilling laughter as they hunt for a witch; a man comes dangerously close to a skunk ape in the Mississippi backwoods.

Delving into the stories of killers who broke the Hippocratic Oath to use their medical knowledge for murder, taking the lives of often vulnerable victims instead of caring for them.

Nick and his girlfriend, Emily, trace the path from privilege to deep addiction; a parental ultimatum and addiction counselling can potentially get this couple off a potent opioid and out of an increasingly violent life of crime.

Emma soon feels overwhelmed by the police interest and wonders what she's started; however, when the stars align to put Daniel in her path, Emma feels a deep connection.

A woman far from home calls police at four in the morning; police find her unconscious and arrest a man who claims amnesia.

A security guard catches a spirit wandering around a Kentucky whiskey distillery; paranormal investigators are met with bone-chilling laughter as they hunt for a witch; a man comes dangerously close to a skunk ape in the Mississippi backwoods.

A villager captures a moment of horror as a mysterious series of explosions lights up a mountainside in India; experts investigate a possible link to lost plutonium during a Cold War spy mission that went disastrously wrong.

Jeff discusses how separation from his biological father and years of bullying fuelled his escalating drug use; the family of this promising auto body technician tries to intervene before crack cocaine crashes his career and life.

A prehistoric-looking creature washed ashore in Georgia.

Sighting of a UFO from the window seat of a passenger jet; a strange underwater discovery is said to be a lost Japanese city; a series of tunnels in Brazil; Tony and team investigate some of the world's strangest photos and videos.

Jennifer teams with journalist Sarah Lyons to investigate the mystery of the Salem witch trials.

Jeff discusses how separation from his biological father and years of bullying fuelled his escalating drug use; the family of this promising auto body technician tries to intervene before crack cocaine crashes his career and life.

A prehistoric-looking creature washed ashore in Georgia.

Sighting of a UFO from the window seat of a passenger jet; a strange underwater discovery is said to be a lost Japanese city; a series of tunnels in Brazil; Tony and team investigate some of the world's strangest photos and videos.

Jennifer teams with journalist Sarah Lyons to investigate the mystery of the Salem witch trials.

In 2000, a young mother was abducted from a parking lot and executed in a nearby field; state-of-the-art DNA testing may provide the answer.

A villager captures a moment of horror as a mysterious series of explosions lights up a mountainside in India; experts investigate a possible link to lost plutonium during a Cold War spy mission that went disastrously wrong.

A security guard catches a spirit wandering around a Kentucky whiskey distillery; paranormal investigators are met with bone-chilling laughter as they hunt for a witch; a man comes dangerously close to a skunk ape in the Mississippi backwoods.

Nick and his girlfriend, Emily, trace the path from privilege to deep addiction; a parental ultimatum and addiction counselling can potentially get this couple off a potent opioid and out of an increasingly violent life of crime.

A father-daughter team confronts the ghost of an ax-murderer; Jack Kenna fights the spirit of a sea-captain.

Sailing to Bell Island, Newfoundland, where the investigators reach out to the ghosts left by a devastating Nazi U-boat attack during WW II; descending into darkness as the trio reveals a group of ghostly miners trapped underground for 80 years.

Cousins Billy and John Smith encounter a massive ship triple the size of a football stadium; guards at Malmstrom Air Force Base in Montana spot an unidentified object overhead.

Several dozen witnesses in Pennsylvania reported seeing a fiery object fall through the sky and land in nearby woods; hundreds of people stargazing in Phoenix, Arizona witness strange lights flying in a V-formation.

Closest encounters and first-hand experiences with abductions.

Jeff discusses how separation from his biological father and years of bullying fuelled his escalating drug use; the family of this promising auto body technician tries to intervene before crack cocaine crashes his career and life.

The double life of Ashlie Stapp fueled her addiction; she kept her US Marine boyfriend in the dark while manipulating ham radio operator Henry Stange into giving her painkillers, with fatal results for this love triangle.

Motorcyclists film a bizarre, elongated humanoid creature walking along a road in Jharkhand, India; experts investigate the violent history behind an organized cult of professional robbers and murderers who targeted unsuspecting travelers.

A Missouri couple's new home is plagued by a ghost; a mysterious creature crosses a busy motorway in Great Britain; the notorious Slenderman visits a woman in West Virginia.

Nurse Genene Jones is believed to have killed as many as sixty children in her care by injecting them with muscle relaxants and other drugs; one bereaved mother leads the charge to bring her to justice.

Find out why devoted animal rescuer Shannon is helping everyone but herself. See her terrified family try to convince her that a life of abuse, assault, and addiction is a dead end for her and her relationship with her three-year-old daughter.

Jennifer teams with journalist Sarah Lyons to investigate the mystery of the Salem witch trials.

A prehistoric-looking creature washed ashore in Georgia.

Sighting of a UFO from the window seat of a passenger jet; a strange underwater discovery is said to be a lost Japanese city; a series of tunnels in Brazil; Tony and team investigate some of the world's strangest photos and videos.

A Missouri couple's new home is plagued by a ghost; a mysterious creature crosses a busy motorway in Great Britain; the notorious Slenderman visits a woman in West Virginia.

Motorcyclists film a bizarre, elongated humanoid creature walking along a road in Jharkhand, India; experts investigate the violent history behind an organized cult of professional robbers and murderers who targeted unsuspecting travelers.

Ryan brings PRS to his hometown to investigate the case of a spectral child.

Learning why stone, metal, and water attract paranormal forces; examining a limestone mansion in Ind. that's tied to the spirit world; following the path of Ohio's soul-attracting rivers; spotting the inexplicable in a Va. inn atop a former mine.

For decades, the debate has raged as to what exactly unidentified flying objects really are; theories have been put forth that attribute UFOs to everything from secret military aircraft to weather phenomena and more.

Ryan brings PRS to his hometown to investigate the case of a spectral child.

Marching into three small towns where the American Civil War once raged; crossing paths with terrifying entities that make residents' skin crawl; meeting a man who unwittingly awoke malevolent spirits while trying to preserve his town's history.

For decades, the debate has raged as to what exactly unidentified flying objects really are; theories have been put forth that attribute UFOs to everything from secret military aircraft to weather phenomena and more.

Kelly and Tonya investigate the mysterious disappearance of a mother who went missing after a Fourth of July celebration; an old tip on where her body might be buried takes a turn when cadaver dogs signal they've found something.

Motorcyclists film a bizarre, elongated humanoid creature walking along a road in Jharkhand, India; experts investigate the violent history behind an organized cult of professional robbers and murderers who targeted unsuspecting travelers.

A Missouri couple's new home is plagued by a ghost; a mysterious creature crosses a busy motorway in Great Britain; the notorious Slenderman visits a woman in West Virginia.

Find out why devoted animal rescuer Shannon is helping everyone but herself. See her terrified family try to convince her that a life of abuse, assault, and addiction is a dead end for her and her relationship with her three-year-old daughter.

Wandering spirits seek to feed on the energy and emotions of unsuspecting patients and medical workers.

In China, a burial site at Jiahu reveals a child's remains marked with peculiar modifications, raising questions about Chinese mortuary practices and more.

Alex Heidbreder, a corrections officer at 200-year-old prison, gets an emergency call for a prisoner in severe distress and finds a prisoner frantically screaming for help; EMT Cory Carmichael rushes to help a man reportedly suffering from a seizure.

Brett Ryan paves a long road of deception. The serial-lying ex-con hides his bank-robbing past from his fiancé and misleads his family, before a late-night confession to his mother leads to a murder no one could have seen coming.

Wandering spirits seek to feed on the energy and emotions of unsuspecting patients and medical workers.

Hunt for the truth in Massachusetts; Salem's ghosts -- including that of the first woman hanged for witchcraft -- reveal things about the city's infamous witch trials; a message from a man executed in the worst way imaginable.

Meeting anxious souls whose lives were taken too soon; visiting a Ky. cinema filled with the spirits of children who died in a fire; chasing a ghostly girl in an Ontario antique shop; shivering as a departed child cries in a woman's Utah dream home.

The expert team from "Help! My House Is Haunted" is called in to investigate paranormal activity at the homes of British celebrities.

The "Cold Justice" team and the Anderson County Sheriff's Office continue their investigation into the quadruple homicide of a family of four in an attempt to finally give answers and justice to their grieving family and community.

For decades, the debate has raged as to what exactly unidentified flying objects really are; theories have been put forth that attribute UFOs to everything from secret military aircraft to weather phenomena and more.

A woman far from home calls police at four in the morning; police find her unconscious and arrest a man who claims amnesia.

Triangle shaped hovering objects are seen by thousands of people and investigated by scientists and government officials, yet they could never be explained; the sightings occurred in a more than two year wave over Belgium, beginning in late 1989.

Kelly and Steve team up with the Anderson County Sheriff's Office to solve the horrific quadruple homicide of a family on Halloween; their investigation reveals a family feud, a trail of stolen cash, and a bloody shoe print left by the killer.

Follows police investigators and forensic specialists across Australia as they battle the clock to find lost loved ones and bring them home.

A woman far from home calls police at four in the morning; police find her unconscious and arrest a man who claims amnesia.

The "Cold Justice" team and the Anderson County Sheriff's Office continue their investigation into the quadruple homicide of a family of four in an attempt to finally give answers and justice to their grieving family and community.

Brett Ryan paves a long road of deception. The serial-lying ex-con hides his bank-robbing past from his fiancé and misleads his family, before a late-night confession to his mother leads to a murder no one could have seen coming.

Triangle shaped hovering objects are seen by thousands of people and investigated by scientists and government officials, yet they could never be explained; the sightings occurred in a more than two year wave over Belgium, beginning in late 1989.

Take a deep dive into watery enigmas; glide over a sunken Italian city; a unique underwater cemetery in the Florida Keys; a yellow brick road to nowhere in the depths of the North Pacific; puzzling rocky constructions off the coast of Australia.

Ryan brings PRS to his hometown to investigate the case of a spectral child.

Meet nurse Beverley Allitt, who conducted a reign of terror in a Lincolnshire hospital's pediatric ward; examine the four mysterious deaths that set off alarm bells for police and led to an emotional trial that put this "Angel of Death" behind bars.

In China, a burial site at Jiahu reveals a child's remains marked with peculiar modifications, raising questions about Chinese mortuary practices and more.

The expert team from "Help! My House Is Haunted" is called in to investigate paranormal activity at the homes of British celebrities.

The "Cold Justice" team and the Anderson County Sheriff's Office continue their investigation into the quadruple homicide of a family of four in an attempt to finally give answers and justice to their grieving family and community.

The coastal metropolis of Miami faces a triple threat of crumbling limestone bedrock, ferocious superstorms and relentless rising oceans.

Brett Ryan paves a long road of deception. The serial-lying ex-con hides his bank-robbing past from his fiancé and misleads his family, before a late-night confession to his mother leads to a murder no one could have seen coming.

Psychedelic swirls in the Utah wastelands; a bizarre configuration of circles in the Sahara; hidden lines with the help of a drone; a remote polka-dot lake in Canada.

In China, a burial site at Jiahu reveals a child's remains marked with peculiar modifications, raising questions about Chinese mortuary practices and more.

Julie purchases a farmhouse and claims it's haunted by an evil slave runner; a couple shares their story of a ghost targeting their son; the story of a fixer-upper haunting.

Exploring the world of psychics.

Paid programming.

A prison guard hears unnerving noises and sees ominous shadows while on patrol; an unseen force repels first responders at the scene of a suspicious suicide; an EMT encounters the anguished spirit of man at a roadside hotel.

Follows police investigators and forensic specialists across Australia as they battle the clock to find lost loved ones and bring them home.

A Massachusetts sailor is shocked to his core when a sinister sound calls out at sea. In the UK, a lifelong paranormal believer reveals her collection of ghost pictures you need to see to believe. It's all unexplained and all caught on camera.

Kelly and Steve team up with the Anderson County Sheriff's Office to solve the horrific quadruple homicide of a family on Halloween; their investigation reveals a family feud, a trail of stolen cash, and a bloody shoe print left by the killer.

Follows police investigators and forensic specialists across Australia as they battle the clock to find lost loved ones and bring them home.

In China, a burial site at Jiahu reveals a child's remains marked with peculiar modifications, raising questions about Chinese mortuary practices and more.

Ryan brings PRS to his hometown to investigate the case of a spectral child.

Triangle shaped hovering objects are seen by thousands of people and investigated by scientists and government officials, yet they could never be explained; the sightings occurred in a more than two year wave over Belgium, beginning in late 1989.

In China, a burial site at Jiahu reveals a child's remains marked with peculiar modifications, raising questions about Chinese mortuary practices and more.

Dearly departed patrons frequent a UK pub; a pregnant woman is stalked by a shapeshifting creature in the Philippines; a Louisiana man witnesses ghostly children playing on a school bus.

On Pat's death day, he prepares for his family's annual pilgrimage to the site of his demise.

Exploring the world of psychics.

The expert team from "Help! My House Is Haunted" is called in to investigate paranormal activity at the homes of British celebrities.

Dearly departed patrons frequent a UK pub; a pregnant woman is stalked by a shapeshifting creature in the Philippines; a Louisiana man witnesses ghostly children playing on a school bus.

On Pat's death day, he prepares for his family's annual pilgrimage to the site of his demise.

Exploring the world of psychics.

A woman far from home calls police at four in the morning; police find her unconscious and arrest a man who claims amnesia.

Follows police investigators and forensic specialists across Australia as they battle the clock to find lost loved ones and bring them home.

Exploring the world of psychics.

On Pat's death day, he prepares for his family's annual pilgrimage to the site of his demise.

Triangle shaped hovering objects are seen by thousands of people and investigated by scientists and government officials, yet they could never be explained; the sightings occurred in a more than two year wave over Belgium, beginning in late 1989.

The ghost of a murderer fights to keep his secrets; in Massachusetts, investigators come to the aid of a man suffering from violent hauntings; an investigator goes on the hunt for the ghost of a violent prisoner in Michigan.

Learning why an important urban center is sinking toward oblivion; soaring over sprawling ruins buried under Saharan sands; learning the modern secret of an ancient fortress; eyeing a ghost town on the edge of the Gobi.

A young mother is viciously attacked by an evil spirit after attempting to cleanse negative energy from her home; teenage siblings encounter a terrifying demonic figure while house sitting.

Childhood friends Ashley Taylor and Kevin Sweat reconnect as adults; Ashley's strange pre-wedding disappearance sheds light on Kevin's disturbing past and his connection to a string of unsolved murders.

A family is held prisoner in their home by spirits, leading to an investigation into the property.

Paid programming.

Taking a look at a violent home invasion that may actually have been a case of mistaken identity; CID Detective Simon Hawkins and his team track down the offenders and confront them with evidence that could put them behind bars.

A villager films a river bank suddenly rising as though a gigantic creature is emerging from beneath the waters in India; experts investigate a potential network of criminal gangs who may be stripping river beds of a very valuable commodity.

Two apparitions crash a livestream from a centuries-old English graveyard; a witch soars through the sky above a mountain in Chile; a mischievous black cat casts a fiery spell in Egypt.

Nicknamed Dr Death, neurosurgeon Christopher Duntsch destroys the lives of many who end up in his operating theater; in two cases it results in death.

Examine the guilt, shame, and shared trauma that has turned Brooks, Taryn, and Joel's childhood home into a hellish drug den where death is a constant threat. Watch a deeply wounded family try to save these vulnerable brothers in their hour of need.

Dearly departed patrons frequent a UK pub; a pregnant woman is stalked by a shapeshifting creature in the Philippines; a Louisiana man witnesses ghostly children playing on a school bus.

Discovering why a whole country sees the number four as something to fear and why is thirteen so disturbing that there is never a thirteenth row on an airplane.

Fortune smiles on a cash-strapped Mike and Alison when a TV company comes calling looking for an old house in which to film their period drama; to get the money, Alison must ensure the shoot proceeds without a hitch.

Two apparitions crash a livestream from a centuries-old English graveyard; a witch soars through the sky above a mountain in Chile; a mischievous black cat casts a fiery spell in Egypt.

A villager films a river bank suddenly rising as though a gigantic creature is emerging from beneath the waters in India; experts investigate a potential network of criminal gangs who may be stripping river beds of a very valuable commodity.

Kelly shares exclusive updates on past cases, answers most asked questions, and catches up with family members and fan-favorite cops.

Take part in a major police manhunt after many detainees scale a fence and escape an immigration removal center; track them across open country with heat-seeking helicopter cameras and discover worrisome links to organized crime.

A brutal double murder shocks Northern California's peace-loving and laid back Marin County; with residents reeling, police chase an elusive killer through three counties and multiple crime scenes to unravel a twisted tale of terror.

Kelly shares exclusive updates on past cases, answers most asked questions, and catches up with family members and fan-favorite cops.

Take part in a major police manhunt after many detainees scale a fence and escape an immigration removal center; track them across open country with heat-seeking helicopter cameras and discover worrisome links to organized crime.

A brutal double murder shocks Northern California's peace-loving and laid back Marin County; with residents reeling, police chase an elusive killer through three counties and multiple crime scenes to unravel a twisted tale of terror.

UFO sightings are at an all-time high; from the lights that terrorized Phoenix to the disappearance of an object into the Atlantic Ocean, these events amaze and unsettle witnesses.

Visitations that leave behind objects or witnesses give us fascinating evidence.

There are areas around the world that seem to keep attracting UFOs.

These are the witnesses that have been literally touched by the unknown; physical contact events that take the shape of nightmares, complete with alien examinations and inexplicable metal implants discovered inside human bodies.

Shiver as paranormal investigators Corine, Leanne, and Kelly tap into the bloody history of one of Ireland's ghostliest spots; find out who, or what, is lurking in the shadows of this terrifying fortress, which could be a portal to the underworld.

Here begins as a hunt for a paranormal research facility in America's most haunted state turns into a journey filled with discoveries for a team of supernatural investigators.

Aircraft pilots and passengers have a scary experience when they come into proximity to objects that don't appear on radar, accelerate at dizzying speeds and then stop on a dime.

Get petrified by cryptic rock structures normally hidden from view; look inside curious dwellings in the Peruvian Andes; visit a sacred monolith in Wyoming's Black Hills; haunt a Turkish stone village; spot an immovable waterfall in Mexico.

A mirror levitates and shatters on its own; Ryan must confront the angry spirit before it does harm.

Paid programming.

Investigating an alarming string of burglaries targeting the elderly with CID Inspector Tom Smith and his team; they narrow down the suspect list and focus their attention on a slippery felon who is wise to all of their tactics.

A man in Norway films weird lights in the arctic sky; an English couple's security camera films their kitchen drawer throwing utensils across the room; two friends trekking deep in the Quebec wilderness film trees moving across the horizon.

Two friends are chased out of California's Death Valley by a UFO; a ghostly hand reaches out to a woman in Wales; a webcam in the Scottish Highlands captures incredible evidence of the Loch Ness monster.

A man is found dead at home after a fire, but everything is not as it seems; his death was caused by something else, something of which a nurse, like his wife, would have considerable knowledge.

Elliot overcame a traumatic childhood and moved to Las Vegas to pursue his dream of becoming a chef, but the rampant drug culture in restaurant kitchens along with the sudden death of his brother sent Elliot reeling.

Kelly shares exclusive updates on past cases, answers most asked questions, and catches up with family members and fan-favorite cops.

A brutal double murder shocks Northern California's peace-loving and laid back Marin County; with residents reeling, police chase an elusive killer through three counties and multiple crime scenes to unravel a twisted tale of terror.

Two friends are chased out of California's Death Valley by a UFO; a ghostly hand reaches out to a woman in Wales; a webcam in the Scottish Highlands captures incredible evidence of the Loch Ness monster.

A man in Norway films weird lights in the arctic sky; an English couple's security camera films their kitchen drawer throwing utensils across the room; two friends trekking deep in the Quebec wilderness film trees moving across the horizon.

The animal kingdom is full of deadly predators, and some of them attack in extraordinary and inexplicable ways; some animals strike back at humans for reasons beyond normal defense and hunger.

On a September morning in 1994, students at a Zimbabwe school witness a silver craft land in a nearby field; numerous adults corroborate the UFO sighting, but the children are silenced; many maintain their account of the incident is true.

Learn who sailed on a sunken, treasure-filled pirate ship and who invoked the devil on a medieval curse tablet; Investigate 17 mini-coffins that have puzzled Scottish historians since 1836 and look inside a mysterious well of bones in Athens.

The animal kingdom is full of deadly predators, and some of them attack in extraordinary and inexplicable ways; some animals strike back at humans for reasons beyond normal defense and hunger.

On a September morning in 1994, students at a Zimbabwe school witness a silver craft land in a nearby field; numerous adults corroborate the UFO sighting, but the children are silenced; many maintain their account of the incident is true.

Learn who sailed on a sunken, treasure-filled pirate ship and who invoked the devil on a medieval curse tablet; Investigate 17 mini-coffins that have puzzled Scottish historians since 1836 and look inside a mysterious well of bones in Athens.

The disappearance of Johnny Gosch, a 12-year-old paperboy from West Des Moines, Iowa, on September 5, 1982, remains one of America's most perplexing missing child cases. What happened is still a mystery, and many are still searching for answers.

For over 1,000 years, people worldwide claim to develop injuries spontaneously.

Two friends are chased out of California's Death Valley by a UFO; a ghostly hand reaches out to a woman in Wales; a webcam in the Scottish Highlands captures incredible evidence of the Loch Ness monster.

Elliot overcame a traumatic childhood and moved to Las Vegas to pursue his dream of becoming a chef, but the rampant drug culture in restaurant kitchens along with the sudden death of his brother sent Elliot reeling.

Investigators disturb tortured spirits trapped in an old passenger train with a tragic past; a ghost hunter is toyed with by the demonic spirit of a child; the violent ghost of a school principal ruthlessly attacks.

The phenomenon of child ghosts and its consequences when medical facilities become their playgrounds.

Shiver as paranormal investigators Corine, Leanne, and Kelly tap into the bloody history of one of Ireland's ghostliest spots; find out who, or what, is lurking in the shadows of this terrifying fortress, which could be a portal to the underworld.

Diving into a harrowing investigation to find out why a young mom is being tormented by her connection to a girl who was murdered in her area years ago; the team uncovers whether she has psychic abilities or if something more sinister is at work.

An aggressive spirit stalks a young family, putting it at the vortex of a sinister force.

Childhood friends Ashley Taylor and Kevin Sweat reconnect as adults; Ashley's strange pre-wedding disappearance sheds light on Kevin's disturbing past and his connection to a string of unsolved murders.

A detective squad pieces together how a man was robbed, badly beaten and left with no memory of the incident; hunting down a promising lead and seeing if CCTV footage of the suspects is enough for a confrontation in the interview room.

Cameras onboard a massive cargo ship in the Black Sea capture the vessel buckling and breaking in half as if seized by a mysterious force; experts investigate a bizarre area of perilous waters linked to a history of Bermuda Triangle-like sinkings.

A shadowy apparition wanders through a Titanic exhibit; a creature that is half monkey and half witch scurries up a quiet neighborhood street in Costa Rica; a spectral moose stuns a woman in Alaska as it runs across the surface of a river.

A serial-killing Canadian nurse walks into a police station of her own free will and confesses to a murderous rampage; her detailed recounting of each death is chilling.

After a terrifying burn accident as a child, Jayden grows up hoping to become a firefighter and fight California's notorious forest fires; after a series of tragic events, 20-year-old Jayden now smokes dangerous amounts of fentanyl.

On a September morning in 1994, students at a Zimbabwe school witness a silver craft land in a nearby field; numerous adults corroborate the UFO sighting, but the children are silenced; many maintain their account of the incident is true.

The animal kingdom is full of deadly predators, and some of them attack in extraordinary and inexplicable ways; some animals strike back at humans for reasons beyond normal defense and hunger.

A shadowy apparition wanders through a Titanic exhibit; a creature that is half monkey and half witch scurries up a quiet neighborhood street in Costa Rica; a spectral moose stuns a woman in Alaska as it runs across the surface of a river.

Cameras onboard a massive cargo ship in the Black Sea capture the vessel buckling and breaking in half as if seized by a mysterious force; experts investigate a bizarre area of perilous waters linked to a history of Bermuda Triangle-like sinkings.

See if a psychic can home in on Scott, a father of three who never came back from a head-clearing trip into the bush. Then unlock a big revelation about a 20-year-old's last steps, which deepens the mystery surrounding her disappearance.

Ed Gein murders at least two women and desecrates the graves of dozens more to feed his bizarre fetishes; the so-called Butcher of Plainfield serves as the inspiration for Norman Bates in "Psycho" and Buffalo Bill in "Silence of the Lambs.".

Kelly and Steve look into the 2007 murder of a single father who was gunned down by a sharpshooter with a high-powered rifle; state-of-the-art digital forensics may help poke a hole in the suspect's alibi.

See if a psychic can home in on Scott, a father of three who never came back from a head-clearing trip into the bush. Then unlock a big revelation about a 20-year-old's last steps, which deepens the mystery surrounding her disappearance.

Ed Gein murders at least two women and desecrates the graves of dozens more to feed his bizarre fetishes; the so-called Butcher of Plainfield serves as the inspiration for Norman Bates in "Psycho" and Buffalo Bill in "Silence of the Lambs.".

A disgruntled fisherman makes the catch of a lifetime.

In 1991, Vicky Hamilton and Dinah McNicol vanished six months apart. Their cases stayed cold until 2006, when Angelika Kluk's murder led to the arrest of Peter Tobin. DNA linked him to Vicky and Dinah, exposing him as an evil serial killer.

Jimmy Hoffa makes enemies easily.

A shadowy apparition wanders through a Titanic exhibit; a creature that is half monkey and half witch scurries up a quiet neighborhood street in Costa Rica; a spectral moose stuns a woman in Alaska as it runs across the surface of a river.

After a terrifying burn accident as a child, Jayden grows up hoping to become a firefighter and fight California's notorious forest fires; after a series of tragic events, 20-year-old Jayden now smokes dangerous amounts of fentanyl.

The coastal metropolis of Miami faces a triple threat of crumbling limestone bedrock, ferocious superstorms and relentless rising oceans.

Get petrified by cryptic rock structures normally hidden from view; look inside curious dwellings in the Peruvian Andes; visit a sacred monolith in Wyoming's Black Hills; haunt a Turkish stone village; spot an immovable waterfall in Mexico.

Childhood friends Ashley Taylor and Kevin Sweat reconnect as adults; Ashley's strange pre-wedding disappearance sheds light on Kevin's disturbing past and his connection to a string of unsolved murders.

A haunted Antebellum mansion in disrepair holds many tales of paranormal activity.

A family deals with a demonic presence, with the help of a new class of characters.

A rookie EMT sees flickering lights and hears strange noises after an elderly patient dies; a man's spirit watches over paramedics as they attempt to save him on Christmas Eve.

A bar-hopping young man fights for his life; detectives pinpoint the assailants on CCTV footage, then find out if the mounting evidence they've uncovered is enough to secure them a conviction.

Footage of a sudden explosion beneath a city street in China and a Russian medical procedure are caught on camera; experts use cutting-edge tech to investigate and uncover the truth behind these terrifying events.

A ghostly figure watches urban explorers from the shadows in England; a velociraptor skitters across a yard in Florida; a fleet of low-flying UFOs makes contact with two men in Ohio.

A hospital is thrown into chaos; a police force looks in the wrong direction: how one nurse fooled the authorities to cause destruction and death by tampering with saline bags at Stockport's Stepping Hill Hospital.

Jesse grows up gender fluid in a household rife with addiction, trauma and dysfunction; after nearly losing his mother to drugs, Jesse spirals into an addiction of his own and now lives on the streets.

McKinven's enquiries ruffle feathers and a furious Julie chides Emma for dragging up the past; when Emma is threatened with a knife, it's clear that someone's hiding something.

Take part in a major police manhunt after many detainees scale a fence and escape an immigration removal center; track them across open country with heat-seeking helicopter cameras and discover worrisome links to organized crime.

A ghostly figure watches urban explorers from the shadows in England; a velociraptor skitters across a yard in Florida; a fleet of low-flying UFOs makes contact with two men in Ohio.

Footage of a sudden explosion beneath a city street in China and a Russian medical procedure are caught on camera; experts use cutting-edge tech to investigate and uncover the truth behind these terrifying events.

Melissa's cocaine and vodka-fuelled rages has her family living in fear; a sexual assault experience has pushed Melissa into a cycle of addiction and underage prostitution that is threatening to end her life before she turns 20.

Experts investigate the claims of "Ohmawing": the theory that Bigfoot makes sounds that can make people sick; examining images captured by NASA's Perseverance rover on Mars; a figure captured on video may be a fabled Latin American witch.

The team looks into a new sighting of Sasquatch in the trees of California.

Jennifer teams up with cryptozoologist Andrew Sanford to investigate newly surfaced evidence of Bigfoot.

Melissa's cocaine and vodka-fuelled rages has her family living in fear; a sexual assault experience has pushed Melissa into a cycle of addiction and underage prostitution that is threatening to end her life before she turns 20.

Experts investigate the claims of "Ohmawing": the theory that Bigfoot makes sounds that can make people sick; examining images captured by NASA's Perseverance rover on Mars; a figure captured on video may be a fabled Latin American witch.

The team looks into a new sighting of Sasquatch in the trees of California.

Jennifer teams up with cryptozoologist Andrew Sanford to investigate newly surfaced evidence of Bigfoot.

Each skipper's next move determines who survives the final winter dash; winds put the Wizard on a collision course with a monster; Jake taps a Hillstrand to save the Saga; Josh and Casey hit numbers not seen since Capt. Phil.

A historical building in Louisiana with a dark history; unsolved murder, vengeful ghosts and things that go bump in the night.

A ghostly figure watches urban explorers from the shadows in England; a velociraptor skitters across a yard in Florida; a fleet of low-flying UFOs makes contact with two men in Ohio.