Discovery Channel TV Schedule & Listings Guide

A woman is investigated for smuggling a baby; officers find packets filled with cocaine, meth, and heroin in carrots -- indicating gang involvement; two young women are caught smuggling pills; a wanted man triggers an alert.

Intel arrives, sending officers searching for two suspected narcotics smugglers flying in from London; agriculture specialists get more than they bargained for when a passenger lands with some illegal and foul-smelling items.

A concealed shipment is hidden in the fifth wheel of a tractor-trailer; officers searching a courier's van find a lethal cache; an unlikely source sets off the radiation detector; a young woman is detained for a warrant she didn't know she had.

Officers get a surprise with narcotics hide within a shipment of rubber; suspicions raise when a routine X-ray reveals packages hidden inside the tires of a truck; a missing teenager with a rap sheet is turned in to the authorities.

In Minnesota, Farmtruck and AZN pick eight local small-tire racers, including a Canadian father-son team to compete for $5K; negotiations with No Prep Queen Lizzy Musi prove that when small tires take on big tires, every second counts.

Rick finally hits the rich pay layer in Rally Valley and accelerates his plans; Tony prospects new ground in Keno; tensions rise on California Creek when a one-two punch shuts down Fred and the Clayton's wash plant.

While hauling in gold-rich Mud Mountain pay, Parker's team missteps and cripples Big Red; Rick's red-hot honey hole floods with only days left in the season; Tony heads back to Hunker, determined to reverse the curse.

Parker discovers if his Mud Mountain gamble will deliver another record gold total; Rick dials up Monster Red in his quest for a record-breaking season; Fred's crew delivers a surprise payout; Tony squeezes his last gold out of Paradise Hill.

Markelle from Arkansas steps up to the plate with a group of hand-picked racers from all over the country.

Boddie and his California racers knocked JJ and the MSO in the head earlier in the season for more money than they've ever lost in one night; Boddie is back in town.

Sig and Keith risk fishing far from land despite a forecast, Super El Niño season and encounter a gauntlet of Bering Sea weather; after sand fleas consume his bait, Johnathan strategically sets pots near a submarine volcano.

Aboard the Wizard, Keith must retrieve his lost anchor in 50-knot winds; Sig attempts a risky new strategy before finding himself racing to secure the next offload slot.

Sig gets blown off course when an Arctic storm strikes the Northwestern on its opening set of Golden King; Jake faces the loss of his longtime engineer; Monte takes the wheel of the Wizard when Keith inexplicably collapses in the wheelhouse.

After Keith suffers a cardiac event at sea, Monte races to get his brother to the nearest airstrip for medivac; as the fleet prays for Keith's safety, the Wizard crew must navigate the notoriously dangerous port entry at Saint Paul.

As Keith fights for his life at Anchorage General, Sig helps his brother Monte to get back on the crab.

John risks capsizing after being forced to fish with a slack tank; Jake hauls in a large sea; under pressure to get home for the arrival of Mandy's second child, Sig and Clark fish deeper than ever before as mechanical problems mount.

In the Season 20 finale, four boats race to beat closing canneries as conditions intensify on the water; Sig suffers a major outage with hours to port; Jake uses his only gear to back out of trouble; John doubles down on orcas.

In the Season 20 finale, four boats race to beat closing canneries as conditions intensify on the water; Sig suffers a major outage with hours to port; Jake uses his only gear to back out of trouble; John doubles down on orcas.

It's one man, one spear, versus one of the fastest fish in the ocean.

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.

In the Season 20 finale, four boats race to beat closing canneries as conditions intensify on the water; Sig suffers a major outage with hours to port; Jake uses his only gear to back out of trouble; John doubles down on orcas.