The Discovery Channel HD (Pacific)

Phil and Heather travel to Predjama Castle, which has been ruled by a brutal robber baron, who is feared for his cruelty; exploring the vast web of caves beneath the cliffside fortress, they seek clues that an ancient god of the underworld may be haunting the castle instead.

Reports of shadowy figures and malevolent spirits from Caribbean folklore draw Phil and Heather to Trinidad. They explore a notorious plantation and an abandoned island once used as a leper colony, searching for the source of the chilling activity.

A serene institution in the American Midwest, seized in righteous anger; a subterranean lair in France designed with a disturbing objective; a Spanish settlement, concealing a story of forbidden love and ruthless retribution.

In New Jersey, a symbol of American pride and dominance; a top-secret site in Japan used for wartime missions of no return; an Italian town, whose residents were given lethal advice by government officials.

Dustin calls on local legend The Pirate for help cracking a boulder blocking him from the richest ground of his life. After Fred is forced to put all diving on hold, Paul returns and they're on track to get gold for the first time this season.

The Digi Diggers get their solar plant installed, but the power hungry mine triggers a total system shutdown; Lisa jeopardizes a sale with a bespoke jeweler designer; Rod goes toe to toe with ratters who stole opal and equipment from their mine.

Adam and Jamie test the physics theory of bullet dropped vs. bullet fired; Kari, Grant and Tory test if it's possible to knock someone's socks off.

Firearm cliches; firing a bent-barreled shotgun; firing a gun in space; dropping a gun in a deep fryer; stopping a bullet with weird items; shooting a neon sign.

Explosive scenarios from Hollywood; shooting a live grenade in midair; containing an explosion within an ordinary object.

Stow your tray tables because in this aviation extravaganza Adam and Jamie tackle two flights of fantasy.

Adam and Jamie blow up a boat with 1,000 lbs. of high explosive; homemade machine gun from the "Breaking Bad" finale.

When a trailer full of sea salt shows up at the bridge, officers decide to inspect it; the bags do contain a crystalline substance and it's an illicit one; during an inspection of a U.S. citizen, something illegal rolls out of his pocket.

A man entering the U.S. with more cash than the $10,000 limit raises eyebrows; officers find a cooler full of rat meat in the back of a traveler's vehicle, but further inspection uncovers something more surprising.

When officers see an approaching vehicle make a sudden U-turn, they give chase and find a bag with a gun and ammunition; tourists arrive with a large amount of Botox and dermal fillers, hinting they may be planning to perform cosmetic treatments for cash.

When a young bus driver approaches the border without any passengers in his coach, officers suspect a smuggling operation may be underway; a man attempts to drive into the U.S. with a van full of goods loaded with more than just clothing.

A speaker cabinet is found to be carrying more than just sweet beats. A driver who took a wrong turn and ended up at the border crossing is packing more than he should be. Following a recent smuggling trend, officers carry out a special operation.

When a lone driver avoids answering officers' questions, an X-ray reveals dark shadows along her car's floorboard, a sign she could be smuggling narcotics; a semi-pro boxer is detained after being flagged for having a warrant for his arrest.

Mike Rowe has the unenviable job of collecting cow dung to use as bait for catching dung beetles; then he heads to West Virginia to try his hand at making glass.

Mike heads to a unique dairy farm in Ramona, Calif. where he learns how to milk, care for and breed dromedary camels.

Mike learns the process of making, wrapping and shipping scrapple or "pan-rabbit" as it is known by the Pennsylvania Dutch.

Mike Rowe harvests caviar from the muddy Mississippi River; Mike brings his parents to work and rectifies misconceptions in his hometown of Baltimore by preparing blue crab seasoning with a fourth-generation spice maker.

Mike Rowe descends into the depths of an aging manhole, coating it with a polyurea liner to extend its warranty in Murfreesboro, Tenn.; Mike joins an horologist and a priest to set the time right as he restores a historic clocktower.