Josh and his team make historic finds as they seek stolen art and uncover other dark secrets sealed away since the end of the war. In the premiere episode, the first of an unforgettable two-part exploration, viewers will follow Josh and his crew as they rush to Poland to be the first people since World War 2 to enter a recently discovered hidden Nazi tunnel inside an extinct volcano. To kick off ‘Adventure Wednesday,’ ardent adventurer Josh Gates takes his explorations to new heights (and into hidden, underground tunnels) in the daring new season of EXPEDITION UNKNOWN. Discovery’s ‘Adventure Wednesday’ lineup returns with all-new episodes, beginning with a globe-trotting, high-octane season of EXPEDITION UNKNOWN at 8PM ET, spine-tingling new EXPEDITION X missions at 9PM ET, and topping off the evening with a nightcap is JOSH GATES TONIGHT at 10PM ET on Discovery Channel. Episodes of EXPEDITION UNKNOWN and EXPEDITION X will also be available to stream on discovery+. The middle of the week just got a lot more exciting as Josh Gates is back with an entire evening devoted to exploring the unknown, uncovering the world’s greatest mysteries, and sharing a laugh and a cocktail with some of the most interesting celebrities, experts, and fellow explorers out there. Trailer | Expedition Unknown: / Password: EXP_U Download: YTLink: Expedition Unknown, Expedition X, and Josh Gates Tonight return.