S4 E11 — The Supernatural
Josh Gates explores the supernatural, from Nikola Tesla's mysterious Death Ray to an encoded message from a Sicilian nun believed to be of demonic origin. Plus, scientists uncover the real explanation behind the Oracle of Delphi's prophetic visions.

S1 E4 — Rocky Mountain Monsters
Rob examines bizarre markings that suggest a violent clash between prehistoric beasts; in California, he explores a bizarre lake for alien life.

S15 E10 — Confiscated Copper Conundrum
When police raid his underground still site, Josh joins Tickle & Henry in a shine run for a stock car legend. Mark & Digger contend with a rotten-egg taste in their blueberry brandy.

S16 E6 — Geoduck, Steam Trains
Showcases how geoduck, one of the world's weirdest seafood delicacies, is harvested; explores how a head of steam is built up on one of South Africa's oldest working trains; features how water polo players are protected from injury.

S7 E5 — Secret World of Nebulas
Nebulas are the strange structures of cosmic gas and dust where stars are born and die, and new discoveries reveal the secrets of these mysterious places.

S7 E2 — Bloodlines
As a new road opens Tanana to the outside world, Charlie confronts an outsider in his own family; Tanana native Lorraine recovers after critical surgery.

S1 E6 — The Columbus Treasure
The discovery of a lifetime becomes a massive salvage operation. Pulling up and verifying Columbus' anchor might be the biggest challenge yet.

S6 E11 — Arizona Washout
A daughter pleads for help from the Raneys to rescue her mother and stepfather whose failing homestead in Arizona sits in the crosshairs of deadly monsoon floods and a menacing cougar.

S1 E4 — Roswell Revealed
Josh's epic search for extraterrestrial life comes to a close in the USA, where a legendary investigation team brings him to a hot case in Arkansas.

S4 E11 — The Supernatural
Josh Gates explores the supernatural, from Nikola Tesla's mysterious Death Ray to an encoded message from a Sicilian nun believed to be of demonic origin. Plus, scientists uncover the real explanation behind the Oracle of Delphi's prophetic visions.

S1 E5 — Code Breakers
Josh Gates examines clues left by the Zodiac Killer, the location of Forrest Fenn's million-dollar buried treasure, and the Voynich Manuscript.

S14 E13 — Lost in Translation
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.

S16 E5 — Stainless Steel, Safe Locks
Explores the production processes for making stainless steel, combination locks, and Indian jaggery sugar.

S15 E11 — Penny Wise, Impound Foolish
Josh constructs a decoy in a daring plot to retrieve his confiscated copper still from the police impound lot. Mike and Jerry promise to deliver something they've never attempted before. Mark and Huck face off with their own backwoods bear problem.

S21 E7 — You're Fired, Mate!
Sig must act quickly as heavy ice entombs the Northwestern. When Keith's Australian greenhorn challenges his old-school command, a culture clash erupts. Hellbent on earning an ownership stake in the Titan, Jake hauls pots at a blistering pace.