The coral reefs in the oceans are the backbone of the planet's entire ecosystem on which humans survive, but pollution and climate change are threatening their survival.

In the 16th century, settlers of Roanoke vanished without a trace, and new evidence reveals what happened; archaeologists investigate what destroyed the original Sin City, Sodom; a bold new theory suggests Stonehenge may be more than it seems.

The investigators look into the death of a man who was thrown to the tigers at the Bronx Zoo.

A man collapses and dies in the middle of the annual San Gennaro festival in Little Italy, and the team investigates how he ended up with a wooden sliver in his heart.

The investigation into a doomed cargo plane reveals a troubling list of maintenance failures that bring down an entire airline.

Jamie and his brother team up for the most stunning wreck of the season; Al hauls a unique piece of equipment on a treacherous backroad; Brandon and highway crews face a difficult night on the Coq; Jamie adds a wrecker like no other to his fleet.

A local heavy recovery firm works through the hard winters to help highway users who fall victim to the brutal road conditions.

Harvey's former mentor wants help when his office is investigated; Mike and Louis try to settle a mogul's estate.

Harvey tries to get an innocent man released but runs into trouble when he talks to the district attorney who seems to be more focused on preserving the system than ensuring that justice prevails.

A young dancer seems to have fallen from the sky, hitting a car near the Queensboro Bridge, and the team determines that her competitors at a famous dance school are the most-likely suspects in her death.

When a wealthy, middle-aged man is murdered in the elevator of his upscale apartment building, the team must first track down the only witness, who fled the scene.

Harvey's former mentor wants help when his office is investigated; Mike and Louis try to settle a mogul's estate.

Harvey tries to get an innocent man released but runs into trouble when he talks to the district attorney who seems to be more focused on preserving the system than ensuring that justice prevails.

A young dancer seems to have fallen from the sky, hitting a car near the Queensboro Bridge, and the team determines that her competitors at a famous dance school are the most-likely suspects in her death.

When a wealthy, middle-aged man is murdered in the elevator of his upscale apartment building, the team must first track down the only witness, who fled the scene.

Jamie and his brother team up for the most stunning wreck of the season; Al hauls a unique piece of equipment on a treacherous backroad; Brandon and highway crews face a difficult night on the Coq; Jamie adds a wrecker like no other to his fleet.

A local heavy recovery firm works through the hard winters to help highway users who fall victim to the brutal road conditions.

The investigation into a doomed cargo plane reveals a troubling list of maintenance failures that bring down an entire airline.

Parker puts it all on the line when he buys Dominion Creek; the Beets family erupts into chaos when eldest son Kevin takes the year off; after disappearing for a year, Rick Ness tries to pull off a longshot comeback.

Parker unexpectedly loses the pay layer in the long cut; Tony Beets tasks the Mikes with ramping up his operation in the Indian River; Kevin struggles to keep his equipment running.

Parker makes a call on Dominion Creek's ice-filled ground; Rick buys a new pump to fire up Monster Red; Kevin's cut floods, sending him scrambling to find a critical piece of equipment.

Harvey's former mentor wants help when his office is investigated; Mike and Louis try to settle a mogul's estate.

Harvey tries to get an innocent man released but runs into trouble when he talks to the district attorney who seems to be more focused on preserving the system than ensuring that justice prevails.

Parker puts it all on the line when he buys Dominion Creek; the Beets family erupts into chaos when eldest son Kevin takes the year off; after disappearing for a year, Rick Ness tries to pull off a longshot comeback.

Parker unexpectedly loses the pay layer in the long cut; Tony Beets tasks the Mikes with ramping up his operation in the Indian River; Kevin struggles to keep his equipment running.

Parker makes a call on Dominion Creek's ice-filled ground; Rick buys a new pump to fire up Monster Red; Kevin's cut floods, sending him scrambling to find a critical piece of equipment.

A young dancer seems to have fallen from the sky, hitting a car near the Queensboro Bridge, and the team determines that her competitors at a famous dance school are the most-likely suspects in her death.

When a wealthy, middle-aged man is murdered in the elevator of his upscale apartment building, the team must first track down the only witness, who fled the scene.

When TransAsia Flight 222 crashes on the Taiwanese resort island of Penghu, investigators uncover a systematic problem with fatal consequences.

Jamie's new operator hits a Coquihalla mudslide, while highway crews are in a life or death race to evacuate motorists and save vital infrastructure.

With all surrounding highways closed after unprecedented flooding, drivers and residents are trapped in Hope as a raging creek threatens Jamie's shop and family home.

Harvey entrusts Mike with closing a major lawsuit; Harvey must make a decision about guarding Mike's secret.

Hardman is back to stay; Jessica needs Harvey's help in drumming up support within the firm; Mike confronts Rachel.

A convicted murderer escapes and begins to kill again, and the assailant's original arresting officer, Mac Taylor (Gary Sinise), comes to help Horatio Caine recapture the felon.

A serial killer evades capture in Miami and goes to New York with a hostage, so Mac teams with Florida officers to recapture the perpetrator and save his captive.

Harvey entrusts Mike with closing a major lawsuit; Harvey must make a decision about guarding Mike's secret.

Hardman is back to stay; Jessica needs Harvey's help in drumming up support within the firm; Mike confronts Rachel.

A convicted murderer escapes and begins to kill again, and the assailant's original arresting officer, Mac Taylor (Gary Sinise), comes to help Horatio Caine recapture the felon.

A serial killer evades capture in Miami and goes to New York with a hostage, so Mac teams with Florida officers to recapture the perpetrator and save his captive.

Jamie's new operator hits a Coquihalla mudslide, while highway crews are in a life or death race to evacuate motorists and save vital infrastructure.

With all surrounding highways closed after unprecedented flooding, drivers and residents are trapped in Hope as a raging creek threatens Jamie's shop and family home.

When TransAsia Flight 222 crashes on the Taiwanese resort island of Penghu, investigators uncover a systematic problem with fatal consequences.

The Cheals' dreams of expanding their business, Opal Empire are crushed by the reality of juggling two mines; the Misfits are reunited after Issy and Joe's return; Slim Pickings' Lee Hobden takes a gamble on mystery opal dirt.

Mark and Digger recruit Patti Bryan to help make hot pepper moonshine and nearly blind themselves in the process.

Team MSA debuts their new 35-ton on the Coquihalla to take on the first double heavy job with their own trucks; Aggressive Towing's junior operator Jaydan struggles to pull out a severe jackknife; blistering winds test Jamie with a subzero recovery.

Harvey entrusts Mike with closing a major lawsuit; Harvey must make a decision about guarding Mike's secret.

Hardman is back to stay; Jessica needs Harvey's help in drumming up support within the firm; Mike confronts Rachel.

The Cheals' dreams of expanding their business, Opal Empire are crushed by the reality of juggling two mines; the Misfits are reunited after Issy and Joe's return; Slim Pickings' Lee Hobden takes a gamble on mystery opal dirt.

Mark and Digger recruit Patti Bryan to help make hot pepper moonshine and nearly blind themselves in the process.

Team MSA debuts their new 35-ton on the Coquihalla to take on the first double heavy job with their own trucks; Aggressive Towing's junior operator Jaydan struggles to pull out a severe jackknife; blistering winds test Jamie with a subzero recovery.

A convicted murderer escapes and begins to kill again, and the assailant's original arresting officer, Mac Taylor (Gary Sinise), comes to help Horatio Caine recapture the felon.

A serial killer evades capture in Miami and goes to New York with a hostage, so Mac teams with Florida officers to recapture the perpetrator and save his captive.

Investigators look into the crash of Delta Airlines flight 1141, which crashes just moments after take off.

Jamie's brother Jason fears for his home after being evacuated by air; Reliable clears vehicles in a slide zone to help reopen the first highway out of Hope; the Coquihalla rebuild begins in a race against winter.

James Luke and over 20 tow trucks must recover 200 cars in a mudslide zone in mere hours; a second atmospheric river threatens the Fraser Valley, as the military is brought in to help engineer solutions.

Mike is caught in the middle of Harvey and Daniel's battle; Mike handles complications; Louis meets his match.

Travis Tanner makes waves when he arrives back in town and accuses the firm of withholding evidence; Louis and Mike finally see eye-to-eye.

After a player is caught cheating and is kicked out of a high-stakes poker game, someone kills the host with a shotgun.

When the owner of a toy hospital is discovered buried among a pile of doll parts, the team pieces together figurines and clues to find the murderer.

Mike is caught in the middle of Harvey and Daniel's battle; Mike handles complications; Louis meets his match.

Travis Tanner makes waves when he arrives back in town and accuses the firm of withholding evidence; Louis and Mike finally see eye-to-eye.

After a player is caught cheating and is kicked out of a high-stakes poker game, someone kills the host with a shotgun.

When the owner of a toy hospital is discovered buried among a pile of doll parts, the team pieces together figurines and clues to find the murderer.

Jamie's brother Jason fears for his home after being evacuated by air; Reliable clears vehicles in a slide zone to help reopen the first highway out of Hope; the Coquihalla rebuild begins in a race against winter.

James Luke and over 20 tow trucks must recover 200 cars in a mudslide zone in mere hours; a second atmospheric river threatens the Fraser Valley, as the military is brought in to help engineer solutions.

Investigators look into the crash of Delta Airlines flight 1141, which crashes just moments after take off.

Josh braves the frigid, shark-infested waters off Cape Cod to dive the world's only confirmed pirate wreck; joining a high-tech recovery mission, Josh chases the multi-million-dollar treasure of Black Sam Bellamy, including coins, gold and jewels.

Chad and Eric discover an abandoned mine deep in the mountains and suspect they are being stalked; at the Bead Site, the team unearths evidence of sacrifice.

Gold prospectors risk their dreams and futures in pursuit of the ultimate golden reward.

Mike is caught in the middle of Harvey and Daniel's battle; Mike handles complications; Louis meets his match.

Travis Tanner makes waves when he arrives back in town and accuses the firm of withholding evidence; Louis and Mike finally see eye-to-eye.

Josh braves the frigid, shark-infested waters off Cape Cod to dive the world's only confirmed pirate wreck; joining a high-tech recovery mission, Josh chases the multi-million-dollar treasure of Black Sam Bellamy, including coins, gold and jewels.

Chad and Eric discover an abandoned mine deep in the mountains and suspect they are being stalked; at the Bead Site, the team unearths evidence of sacrifice.

Gold prospectors risk their dreams and futures in pursuit of the ultimate golden reward.

After a player is caught cheating and is kicked out of a high-stakes poker game, someone kills the host with a shotgun.

When the owner of a toy hospital is discovered buried among a pile of doll parts, the team pieces together figurines and clues to find the murderer.

A commercial airliner goes down in eastern Ukraine, and the evidence indicates that it was shot down.

Cary Quiring is tasked with keeping crucial goods flowing; a wreck that brings three heavies out tests Jamie's new LA Rotator; Aggressive Towing tackles a crucial sideways transport.

James Luke and the Reliable team contend with two detoured wrecks on the same punishing corner of a narrow route; MSA's Kirpal and sons must stretch a long line to reach a machine stuck on a farm.

Harvey is given the second chair position on an important case, and his backseat driving may have far-reaching consequences.

Harvey and Mike take on an unorthodox case; Louis and Rachel team up; Jessica runs into problems while defending the firm.

After a premiere player in an all-female roller derby league is killed during a match, the team tries to determine if a jealous teammate or an overzealous opponent caused the death.

When an eccentric millionaire is found dead in his home, Danny accidentally activates the dead man's panic room and becomes trapped inside with the body.

Harvey is given the second chair position on an important case, and his backseat driving may have far-reaching consequences.

Harvey and Mike take on an unorthodox case; Louis and Rachel team up; Jessica runs into problems while defending the firm.

After a premiere player in an all-female roller derby league is killed during a match, the team tries to determine if a jealous teammate or an overzealous opponent caused the death.

When an eccentric millionaire is found dead in his home, Danny accidentally activates the dead man's panic room and becomes trapped inside with the body.

Cary Quiring is tasked with keeping crucial goods flowing; a wreck that brings three heavies out tests Jamie's new LA Rotator; Aggressive Towing tackles a crucial sideways transport.

James Luke and the Reliable team contend with two detoured wrecks on the same punishing corner of a narrow route; MSA's Kirpal and sons must stretch a long line to reach a machine stuck on a farm.

A commercial airliner goes down in eastern Ukraine, and the evidence indicates that it was shot down.

A suspected drunk driver gives police a good laugh; a Jiu-Jitsu Master defends a convenience store; multiple prisoners attempt to reclaim their freedom; a convicted murderer leads police on a wild goose chase.

A group of customers fight in a small shop; a tired police officer gets a helping hand from a civilian; an angry customer takes her frustrations out on a fast-food restaurant; an active shooter interrupts a youth baseball game.

Three women who are devoid of a moral compass believe they can outsmart everyone.

Muskogee officers battle to save an injured woman from her attacker; an undercover agent finds himself at the wrong end of the barrel; in California, an officer faces a knife-wielding teenage girl.

Harvey is given the second chair position on an important case, and his backseat driving may have far-reaching consequences.

Harvey and Mike take on an unorthodox case; Louis and Rachel team up; Jessica runs into problems while defending the firm.

A suspected drunk driver gives police a good laugh; a Jiu-Jitsu Master defends a convenience store; multiple prisoners attempt to reclaim their freedom; a convicted murderer leads police on a wild goose chase.

A group of customers fight in a small shop; a tired police officer gets a helping hand from a civilian; an angry customer takes her frustrations out on a fast-food restaurant; an active shooter interrupts a youth baseball game.

Three women who are devoid of a moral compass believe they can outsmart everyone.

Muskogee officers battle to save an injured woman from her attacker; an undercover agent finds himself at the wrong end of the barrel; in California, an officer faces a knife-wielding teenage girl.

After a premiere player in an all-female roller derby league is killed during a match, the team tries to determine if a jealous teammate or an overzealous opponent caused the death.

When an eccentric millionaire is found dead in his home, Danny accidentally activates the dead man's panic room and becomes trapped inside with the body.

A football coach and midwife attempt to survive in Chiapas, Mexico, a location no survivalist has lasted 21 days in; their different approaches to survival hurt their ability to endure.

A former Marine sniper and a Mississippi mom try to endure 21 days in a haunted Colombian swamp; extreme humidity, insects and infection prove difficult to endure.

A transgender Air Force vet and a South African farmer tackle the deadly bush of Zambia, where territorial elephants, baboons and crocodiles threaten their every move; when disaster strikes, a sibling seeks redemption.

After his brother is medically tapped, a South African sibling seeks redemption in Zambia, paired with an endurance athlete from Louisiana; vindication proves harder than expected.

Holidays highlight unique traditions, but when clashing personalities and lots of alcohol get mixed, mayhem and memorable stories are sure to follow.

A wilderness guide and a software engineer diagnosed with Asperger's try to survive in the Botswana desert; herds of aggressive elephants threaten their security at night, but their biggest hurdle is learning to communicate with each other.

For the first time, two young adult kids of veteran survivalists try to prove they are as good as their parents when they take on 21-days in a dense Mexican rainforest where they face pumas, jaguars and deadly fer de lance snakes.

Shark attack fan survivalist teams up with an environmentalist military vet for a 21-day challenge in Zambia.

A wilderness EMT and a hard-headed homesteader try to survive in a coastal Colombian jungle; when their priorities clash, their partnership becomes volatile.

Survivalists Max and Rylie are dropped in the South African bush with two novice fans to try and survive 21 days with spitting cobras, aggressive warthogs, rhinos and leopards.

Two women and two men face off in South Africa to see who can survive 21 days.

Two survivalists try to endure 21 days in the wreckage of an abandoned village in Botswana's Okavango Delta, where aggressive hippos have claimed the territory.

Two survivalists attempt to endure 21 days in the wreckage of an abandoned village in Botswana; an anthropologist and mountaineer take shelter in a labyrinth of caves in Colombia.

An American and a Brazilian survivalist are dropped into the unforgiving South African bush for 21 days only to discover that neither of them speaks each other's language.

Two foreigners try to become the first survivalists to endure 21 days on U.S. soil; rattlesnakes, unfamiliar terrain and plummeting temperatures threaten to send them back across the pond.

A tough-as-nails MMA fighter and a professional paramedic need to dig deep to survive 21 days in the brutal caiman-infested jungle of Rupunini, Guyana.

A backpacker and experienced hunter attempt to survive 21 days in a swampy Argentine savanna teeming with mosquitoes and violent subtropical storms.

Four male survivalists who tapped in previous challenges seek redemption in South Africa; humbled by their past failures, they hope to survive 21 days and triumph as a tribe.

Jaclin, a paralegal, and Michael, a fishing boat captain, take on 21 days in the mighty Kalahari Desert; they soon are hit with an unexpected cold front and aggressive lions and rhinos threatening their shelter.

In this Tribes' episode, two men and a woman attempt to survive 21 days in the searing heat of Limpokwena, South Africa; after suffering from harsh burns and severe dehydration on Day 1, their will to endure is threatened.

For the first time ever, two Naked and Afraid crew members attempt to survive 21 days in front of the camera. But faced with swarms of unrelenting insects and a lack of food, this history-making duo is about to get a taste of their own medicine.

An expert hunter and an Air Force veteran attempt to survive in Zambia, where they are preyed upon by deadly lions, aggressive baboons and elephants.

Two fans discover that the dense, mosquito-infested mangrove of Palomino, Colombia, isn't the only challenge they face; as their communication breaks down, they must come to a compromise or survive on their own terms.

Two survivalists attempt to endure 21 days in Mexico's Devil's Canyon, a notorious hellscape where no one else has managed to make it past one week.

Rachel, a survivalist from "Naked and Afraid of Love," and Na'im, an outdoorsman from Colorado, take on 21 days in the rugged wilderness of Argentina, but freezing nighttime temperatures may push them to their limit.

Twelve brave souls take on their first XL challenge in the Colombian Badlands; survivalists must battle disease-carrying insects, scorching heat, six-foot caiman and stalking jaguars; they must trek 40 miles in 40 days.

The Raneys share memorable, unseen moments from nearly a decade of rescuing homesteads, revealing how they've enriched their lives and inspired them to keep fighting for homesteaders across the country.

In a new, bigger challenge, 14 of "Naked and Afraid's" best go head-to-head; big skills and bigger egos clash as bare-handed killer bulent, survival expert Ky, as well as previous competitors.

Adam, Heather and Sam score a protein win, but the trek through Colombia's badlands puts the team at risk; Chris battles a mystery illness; Nathan reveals a secret to his partners; the Proving Grounds send a survivalist home.

Sam gets a tick bite in the worst spot imaginable; Terra encourages Lynsey to quit; desperate for protection, Adam and Heather start a shelter rebuild; Malorie stalks a massive caiman; The Badlands send a survivalist home.

A newly-formed tribe quickly works together to stalk and kill a caiman; the pressure to trek forty miles to extraction pushes two teams to make risky migrations; a survivalist is on the brink when medics discover parasites in their digestive system.

A massive food win buoys Terra and their whole team; on the heels of a caiman kill, Malorie sets her sights on a bigger prize; Heather is shocked when Adam tells her he has not been sharing food; a scorching migration could end Heather's challenge.

Kaiela leads her team on a punishing trek that puts her challenge at risk; Adam and Heather's smoldering tension makes the new camp choose sides; desperate for protein, a risky survival choice pushes Heather to her breaking point.

The remaining survivalists join forces; when the group splinters to hunt resources, it leads to a big protein win but creates tension between Lynsey and Terra; Nathan uses a primitive cooking method to maximize the meat.

Facing an unprecedented two-day extraction, the final eight survivalists hunt, fish and trap potential food; an emergency overnight in the jungle causes fears and tensions to flare; Malorie's struggles cause medics to step in.

In a new, bigger challenge, 14 of "Naked and Afraid's" best go head-to-head; big skills and bigger egos clash as bare-handed killer bulent, survival expert Ky, as well as previous competitors.

With winter's first blow, new recruit, John, must save a snowplow stuck in an icy river; changes rock the company, forcing Colin to take on a new role; the community says farewell to a Heavy Rescue legend.

Jamie's new BC crew struggles with a badly mangled trailer on a dangerous blind corner; Colin slips up on a big recovery in Alberta and Jamie's brother has to take over the job; Brandon steps up to a new role.

A flaming wreckage becomes the biggest recovery of Colin's career; as snowstorms pummel the Coquihalla, Al Quiring heads up, ready for battle; John faces off against a mangled tractor and becomes a mentor.

Two days before Christmas, a semi plows off a bridge, leaving a trailer and three RVs dangling over a raging river. It's up to John, Jamie's new BC driver, to get holiday traffic moving and prove himself on a multi part recovery.

Al races to recover a trailer and open the TransCanada before the morning rush; Jamie runs a race of his own when a semi loaded with pharmaceuticals plunges down a bank.

Jamie's operations are crippled when freezing rain covers Hope in a thick layer of ice; a good friend of Jamie's is called into action when two semis collide.

Al and Gord work to rescue a loaded semi that's teetering on the edge of a 300-foot drop; Colin faces a white-knuckle drive on a remote Alberta back road.

In the Pacific Northwest, Jared Douglas and his logging crew risk life and limb to harvest the planet's remote and valuable trees, but getting these giants from the forest to market is deadly.

When recovery crews team up for a massive wreck, a close call leads Brandon to reconsider his future in the business; attempts to straighten out a jackknifed truck get twisted.

Deciphering, at last, clues left by the Zodiac Killer, which lead to a prime suspect; revealing the location of Forrest Fenn's million-dollar buried treasure; decoding the "Voynich Manuscript," a text that possibly explains the origins of life.

The Davis and Quiring families team up for a rare joint recovery; a big rig is left teetering in a seemingly impossible position.

A simple job turns into an urgent puzzle when a flipped semi pulls Jamie back out on the road; Randy Jacknife faces a truck trapped under its load of steel.

Al and Gord gamble on a job that's closed the highway and pushed both green wreckers to the limit; Jamie's crew battles a whiteout.

The cast and crew discuss the shows past four seasons; they learn what Jamie's former drivers are currently doing.

Jamie takes control of the rotator for the first time in months; Jamie turns to his competition for advice.

Jamie battles a truck fire on the Coq and reveals big changes to his operation; a former team member makes a surprise return.

Mission Towing races to an urgent call on a logging road; Jamie deploys his air bag recovery system to flip a tractor trailer.

Jamie and his team deal with a jackknifed semi-trailer on the edge of a bridge; the Mission Towing team races to finish a recovery and open an active logging road.

Gale-force winds send a semi airborne and shut down the Trans Canada Highway; Al and Gord try to recover a massive mining truck.

On the busiest travel week of the year, Al works to clear a burning tractor trailer off the Coq; Colin rescues a delivery truck loaded with Christmas parcels.

On his first night on the Coq, prairie tow operator Jonny Tipton faces his toughest recovery; Quiring Towing's Gord Boyd clashes with stubborn truckers on the Coq.

Al Quiring has to rescue a pair of 40-ton excavators buried in a bog; Jamie and Scott are called to a mysterious wreck in The Canyon.

Tough times in Alberta force Colin to weigh his future; the Mission Towing crew races to clear a wreck that's shut down the rail line outside Hope, B.C.

Jamie calls in Jason's rotator to tackle a recovery in the Canyon; the Mission Towing team juggles a lost load of telephone poles; emergency responders race to a crash involving one of Jamie's crew.

The Quiring family works together to lift a semi loaded with industrial paper rolls; an original member of Jamie's towing family battles the physical and mental toll; Nik and Neill tackle a twisted B-train that's shut down Highway 7.

A crash between two tractor-trailers has Jordie's crew working through the night; Scott is forced to get inventive to finish a job; Al and Gord try to get a handle on a 30-ton cement drum.

Jamie's rookie driver is dispatched to rescue a convoy of oversized loads on The Coq; Scott battles to keep a lumber truck from tipping; Mission Towing tries to fish a 40-thousand pound relic out of a river.

Al Quiring attempts to pull up a logging truck that plunged 700 feet off a cliff; Jamie and Scott team up on a heavy roll over in Fraser Canyon.

Winter strikes hard and fast as Jamie Davis and his heavy rescue crew face tough new challenges in Hope, BC; a former operator returns but a spectacular wreck pushes him to the edge on his first mountain recovery.

Jamie helps Colin recover a massive wreck near the Rock Cut; Brandon confronts his fears on the big job; Al Quiring tackles an overturned truck loaded with lava rock.

A troublesome winch line forces Jamie and cousin Paris to find a quick fix; Jordie faces a twisted wreck that crashed through an airport fence; Al tries to save a logging truck from a rising river.

A crash in the Fraser Canyon has Colin and crew working below an unstable rock slope; Jamie charts a new course for his business, setting out on a 20,000-kilometre journey; a heavy rescue legend helps Dylan on an ice recovery.

Rick risks flooding Rally Valley to haul in big gold nuggets; Tony's protégé, Cousin Mike, attempts a risky plant move; Kevin's biggest machine goes down while another lights on fire.

Depicting the lives and exploits of a group of miners hoping to strike it rich in the wilds of the Yukon Territory.

A winter storm unleashes chaos on all highways around Hope, B.C., forcing Jamie's team into an all-night battle; Jason and Merv tangle with a fully loaded tractor-trailer in a snowy ditch; a heavy rescue birthday boy finally gets his present.

Jamie's newest classic wrecker, The Python, is put to the test on a tractor-trailer embedded in a row of trees; Ken and Dylan are called up an icy mountain road to recover a flipped logging truck.

A truck driver survives a crash on The Coq during a snowstorm; hampered by heavy snow, rocks and extreme cold, Colin and Kelly finish the tough recovery and meet a tight deadline.

An oversized load tests Jamie and his rebuilt wrecker HR-126; a gravel hauler ricochets off a rock wall leaving a twisted mess for Kelly and John; swamper Gord Lundin gets a chance to operate his own tow truck.

Jamie and his fleet of heavy wreckers are paralyzed in his own yard by a massive snowfall; a tow-up in deep powder turns into big trouble for Colin; Al and Gord rescue a teetering semi during the morning rush on Hwy 1.

Jamie's 13-year-old son gets a lesson in wreck recovery after a semi crashes down a 150-foot embankment; rock slides north of Hope trigger road closures and an explosive clean-up; Dylan puts on his hip waders to fish a truck out of a lake.

Jamie takes The Python off road for the first time; Jamie's brother Kelly battles high winds and a power pole to save a semi loaded with pipes; Gord Boyd picks up a new heavy wrecker for Quiring Towing.

A missing truck driver trapped inside a wreck for two days draws Jamie Davis Heavy Rescue and first responders into one of the most difficult and emotional recoveries in years.

One of the worst winter storms in years forces officials to shut down The Coq; working through blinding snow, freezing rain and even an avalanche threat, heavy rescue crews help truckers and drivers out of the closure zone.

Jamie Davis travels across North America to explore the roots of heavy rescue, from the first tow truck, to the latest modern machines; his classic restoration, the Mighty Mo, finally comes to life.

As British Columbia's heavy rescue heroes gear up for another winter, Jamie, Al, Jason, and Ken team up to look back at each other's recoveries and take a look ahead at the new season.

Jamie's restored classic wrecker faces its first test; Colin, Merv and Jason attempt a heavy rescue; Al battles with an excavator buried in a rockslide.

Dylan is faced with a puzzle of twisted metal when two big rigs collide; Jamie rescues a propane truck with his Python wrecker; Al is dispatched to a collision on the Coq.

Jamie and Colin work to recover a buried semi on the Trans Atlantic Canada Highway after a massive mudslide.

Al and Gord are called in to winch a 65-ton steel bridge across the Coquihalla River; Jamie takes a bad fall while operating' Mighty Mo; a new recruit is put to the test on an epic backroad recovery.

Colin takes the controls of Mighty Mo during a whiteout storm; Dylan encounters a semi on the edge of a cliff; Jamie and Paris attempt to bring an old dozer back to life.

Al and Gord search for a lost logging truck on a snowy back road; Jamie attempts a maneuver with Mighty Mo; Colin faces his fear while working on a semi.

Jamie heads north in B.C. to rescue a tractor trailer that tipped on its side.

Jamie faces his toughest wreck in years, so he calls in a familiar face and a 50-ton rotator; Al attempts to free a 70-ton excavator from a mud hole.

A tour bus spins out of control, launching Al Quiring into action; Jamie gets to test a heavy-duty weapon bolted to the front of Mighty Mo; a new team on The Coq takes on a trailer with live pigs.

Merv is called in to help Reliable Towing with three major wrecks; Dylan races to recover a car that is hanging on a bridge; Colin encounters a puzzling heavy rescue.

A driver runs into trouble at the base of The Coq; Colin faces a night of heavy rescue; during a job, Jamie experiences chest pain.

Cary is thrust into a dire situation; the crew faces a tricky recovery for a truck hauling new cars; Jamie heads north to the Yukon to retrieve a wreck.

Cam gets a chance to run Mighty Mo; the team races to clear a scattered load of lumber.

Jamie attempts to recover a trapped tractor trailer; the crew heads up a remote mountain; tow companies come together for a good cause.

A 40-ton boulder crashes onto B.C.'s Fraser Canyon Highway and launches Al Quiring into the crush zone; Jamie, Brandon, and Paris climb a deactivated logging road to retrieve a lost wreck.

An overturned load of heavy pipe becomes an all-out battle for Reliable Towing; Jamie considers buying another vintage wrecker; Mission Towing's Ken Duperon hustles to save a vehicle on the verge of sliding off a snowy mountain road.

On B.C.'s Coquihalla Highway, an early snowfall catches truckers off guard and puts Jamie Davis face to face with a heavy fuel tanker; sparks fly when James Luke and The Black Sheep try to rescue a semi in deep snow.

Jamie tests the limits of his classic wrecker against a rock crusher in a gravel pit; Mitch and James scramble to save a truck and camper on an icy cliff; Colin finally gets a crack at Mighty Mo's push bumper.

When a dump truck and trailer crash into dense bush, Al Quiring and Sons become heavy rescue lumberjacks; with the help of Gord Boyd, Team Green overcame environmental obstacles and a twisted wreck trapped in the trees.

In Hope, Jamie, Colin and Cam battle heavy rains to recover a rolled semi blocking the highway through town; with traffic to The Coq cut off and a trailer full of cooking oil starting to rip, Jamie's crew must get the road open.

Near Merritt, a parcel delivery truck is torn open, scattering hundreds of packages across The Coq; Reliable Towing overcomes numerous obstacles to clear the wreck.

A cliffside recovery on the banks of Coldwater River puts James and Adam on thin ice; Colin makes a roadside repair in the middle of a winter storm; Al and Gord race to move a house off a busy highway.

Merv is dispatched in Aggressive Towing's 50-ton rotator to open the road after a collision in Fraser Valley; Jamie takes a classic wrecker on a 2,000-kilometre journey north; news about a key member of the Mission Towing family hits home.

A tractor trailer clinging to the edge of a mountain has Mitch, Merv and James pulling together to save the load; after years of relying on older equipment, Jamie Davis brings home a surprise for the team.

James Luke and Black Sheep rush to clear a tractor trailer on its side loaded with heavy doors. An 18-wheeler filled with firewood tests Cam and Colin.

A polar vortex brings extreme cold and brutal working conditions to truck drivers and heavy wrecker operators on The Coq; Colin fights to recover a frozen rig; Cam finds himself in a dilemma with one of Jamie's classic wreckers.

A terrifying crash involving one of their own shocks Team Reliable; Dylan and Merv pair up to lift a heavy load of steel pilings off a highway; Cam races to rescue a fellow tow operator stuck on a blind corner.

Mitch discovers a massive wreck involving two semis; Reliable and Aggressive Towing join forces to recover a pair of entangled 18-wheelers; a tippy trailer abandoned on a soft shoulder tests Jamie; Gord finds himself in deep in a peat bog.

Brandon and Cam team up to rescue a lumber truck tangled in a rock face on Highway 3; Al digs out a buried semi on a notorious corner on The Coq; a tractor fire puts James in the hot seat.

Near Hope, B.C., a burning truck hauling frozen chicken has Cam and Jamie in a race to move the smoky hazard off the highway; a flipped logging truck near Merritt turns into a tussle for Mitch and James.

A lost load of lumber pulls Jamie and Colin Mclean into a battle on the banks of B.C.'s Skagit River; Al takes a chance with Big Green to rescue a sinking excavator; James and Rooster wrestle a twisted wreck near Merritt.

After surviving a near-fatal heart attack, Ken leads the Mission crew on its most daunting recovery in years; lodged in the trees, 200 feet below a mountain road, the damaged dump truck pushes Ken's team to the edge of disaster.

Jamie and his tow brothers discuss some of their toughest backroad adventures; Al, Ken, Jason and Mitch swap tales and share advice on some of their most spectacular off-road recoveries.