The Discovery Channel HD (Pacific)

A check for a fishing license takes an unlikely turn; an abandoned car is found on private property; Wardens Sellers and Roraback are in pursuit of illicit hunters; zebra mussels are suspected of being illegally transported in Llano County.

The tow truck drivers hustle on the craziest night of the year in Las Vegas: New Year's Eve; Jeremy tries to break a record; Elmer makes a life-changing decision; Pineapple faces the wrath of his boss.

It's a race for the most tows as thousands of fans descend on Las Vegas for the Formula One Grand Prix; TW subdues a raunchy party while Shawn confronts a racegoer carrying a big wrench; Elmer's frustrations with The Tow Truck Company come to a head.

Tensions run high on the streets of Las Vegas as the year comes to a close; Elmer has a blowout with his boss; Pineapple rips into a new driver over their worst tow ever; Nick deals with a raging customer.

Pineapple argues with a woman who has a hall pass from her husband; Jeremy gets in a fight, and Elmer hunts for a massive haul; TW's easy tow turns into an ordeal, while a crazy customer goes ballistic on Bridgett; Shawn makes a spooky discovery.

A drunk man dressed like a giant baby refuses to let Shawn tow his car; a frightening find spooks Pineapple; during a call at a haunted house, the tow truck driver is terrified.

Two men are caught attempting to smuggle a rooster for cockfighting; officers find millions of dollars of counterfeit goods; a woman flees after dumping drugs on the bridge; an illicit load is found hidden in the axles of a lowboy trailer.

Officers find a man and his family driving a suspiciously modified truck; a young man is caught with narcotics strapped to his body; a crosser is detained for having a record of smuggling an illegal migrant across the border.

Officers find a box of syringes filled with a mysterious black liquid; a computer programmer from South Korea raises suspicions when he says he's coming for business meetings, but it sounds like he's planning to work in the US illegally.

Officers find a fraudulent passport hidden in a video game case, a telltale sign of criminals at work; a traveler who just returns from Paris claims she has nothing to declare, but a search of her bags reveals a suspicious $200,000 diamond watch.

In Atlanta, an officer discovers evidence of a lottery scam - a tactic used by criminals to trick victims into giving up thousands of dollars in exchange for alleged winnings; this find could lead CBP to uncover the network behind this nefarious ploy.

After two unclaimed cargo packages are opened, experts are called in after officers suspect that they may contain stolen ancient artifacts; when a family heading to the Middle East is found carrying more than the allowed $10,000 limit, questions arise.

In Oklahoma, a suspected drug dealer leads police on a perilous pursuit down a busy interstate; in Michigan, an officer comes under fire from a masked gunman; in Missouri, a sting operation goes wrong when the armed suspect takes off on foot.

Caddo Parish Correctional Center is struggling with a staffing shortage, the inmates outnumber the deputies by 180 to one; to ensure the safety of both inmates and staff alike, the Emergency Response Team springs into action.

A Scottish teenager claims that he's come to meet his girlfriend from a gaming website; when a couple arrives with a large amount of cash split into bundles, officers dig deeper and see that the man is under investigation by the FBI.

After two unclaimed cargo packages are opened, experts are called in after officers suspect that they may contain stolen ancient artifacts; when a family heading to the Middle East is found carrying more than the allowed $10,000 limit, questions arise.

In Oklahoma, a suspected drug dealer leads police on a perilous pursuit down a busy interstate; in Michigan, an officer comes under fire from a masked gunman; in Missouri, a sting operation goes wrong when the armed suspect takes off on foot.

Caddo Parish Correctional Center is struggling with a staffing shortage, the inmates outnumber the deputies by 180 to one; to ensure the safety of both inmates and staff alike, the Emergency Response Team springs into action.

A Scottish teenager claims that he's come to meet his girlfriend from a gaming website; when a couple arrives with a large amount of cash split into bundles, officers dig deeper and see that the man is under investigation by the FBI.

In Kentucky, Farmtruck and AZN pick eight local small-tire racers to compete for $5K and a chance to battle it out with a Street Outlaw; when NOLA's Jerry Bird races the winner, smack talk flies and tensions boil over.

Kevin is sent reeling when Parker shows up demanding the money he's owed; Parker discovers he's losing gold from a wash plant on Dominion Creek; Tony's son Mike puts new recruits through boot camp on Paradise Hill.

Joe and Cody battle dehydration and hypothermia in Chile's Atacama Desert, an area known as "Mars on Earth.".

Stranded in the South African bush, Joe and Cody struggle against deadly predators -- both animal and human.

Deep in New Mexico's Chihuahuan Desert, Joe struggles to escape from an abandoned mineshaft; rattlesnake is on the menu.

Joe and Cody lock heads over priorities while trying to survive the jungle of an uninhabited Hawaiian island.

Joe and Cody are marooned on the banks of the mighty Amazon River and surrounded by an unforgiving jungle.

Forced to trek two days to a water source, a laid-back hunter and an opinionated adventurer clash in Zambia, risking their 21-day challenge; as danger mounts, their trust cracks.

Underestimated his whole life, a survivalist with dwarfism tries to prove himself in the Amazon but struggles against predators and his partner.

From Mexico's Yucatán to Botswana's Okavango Delta, fan favorites Ernie and Mandy return, this time for 21 days; armed with new tools and improved skills, can they survive? Or will Africa eat them alive?

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.

Marty responds to a new call for help from the Welchels, who struggle to manage their 40-acre homestead after their ranch hand left; he gives them a new, life-changing masterclass on homestead consolidation.

In California's fire country, a couple's dream homestead is on the brink of ruin. When Marty must leave early, Misty and Matt face the flames -- and an urgent fix -- alone in a high-stakes rescue.

At over 9,000 feet, a Colorado family faces inhospitable alpine isolation; winter looms, threatening to cut them off from civilization; the Raneys must upgrade their infrastructure and water supply before it's too late.