What happened in a political showdown that ended in a duel? And, what was the southwestern hotel where one guest sold America's nuclear secrets to the enemy?

Don examines an engineer's daring mission to save a high-flying zeppelin, and an explorer's life-long quest to uncover an ancient lost Inca City.

Don examines a Titanic survivor plagued by disaster, mysterious crop circles in England, and the case that created the first female detective in the NYPD.

The Viking Lander may have found life on Mars. Meanwhile, how can a starship be spotted in the Aurora Borealis? And what exactly are NASA's mysterious Moon Pigeons?

A journey to decode a rare East German war medal leads Justin to Berlin, where he uncovers a sinister plot that nearly ignited World War III.

Andrew Zimmern continues his quest to taste the weird and wonderful foods of the USA. He heads to Hawaii where he tries raw crab meat.

Chef Andrew Zimmern continues his quest to taste the weird and wonderful foods of the USA. He heads to Louisville where he samples frogs' legs.

The investigators head to the Sierra Nevada Mountains to investigate multiple Sasquatch reports. Can they find a way to lure these elusive creatures out of hiding?

Experts analyse new evidence that could prove the Beast of Bray Road is terrorised a Wisconsin town. Plus, is the human-wolf hybrid spreading across the US?

A journey to decode a rare East German war medal leads Justin to Berlin, where he uncovers a sinister plot that nearly ignited World War III.

Andrew Zimmern heads to Austin so sample local food. Dishes include whole roasted pigeons, donuts topped with chicken, and milkshakes made with bacon.

The frontier spirit can still be found in New Mexico and as Andrew finds out it's reflected in the food.

The Hubble Telescope spots thousands of unknown objects travelling faster than light. Are we being watched? Or could we ourselves be aliens from another world?

The last days of winter bring change. The future of town lies in the balance. Jason races the melting river crossings to reach his crashed airplane.

The forests of Arizona's Mogollon Rim are believed to be the perfect habitat for young Sasquatches. Can the local Apache Indian tribe help the team to find them?

Don investigates the story behind the invention of the parachute, a blizzard that threatened 13 young students and musical legend's humble beginnings.

An ancient spindle whorl suggests that Norse women led the Viking expedition to North America. Justin uncovers the untold story of America's origins.

Josh treks deep into Siberia for a site where priceless mammoth bones are mined out of the permafrost. Then, he takes the DNA samples back to the lab.

Don Wildman examines a fire hose linked to unlikely heroes. Plus, he investigates the story behind an iconic tongue twister and an unusual boat.

Don Wildman investigates a miraculous air bubble on the ocean floor, one man's unbelievable fight for survival and a terrifying hijacking off the coast of Somalia.

Guests report attacks by an aggressive spirit at a hotel. And, is a shapeshifting menace responsible for thousands of abductions in the Alaska Triangle?

Jack Osbourne and Katrina Weidman travel to New Orleans to perform the first-ever paranormal investigation of the haunted LaLaurie Mansion.

Jack Osbourne and Katrina Weidman travel to Wilder, Kentucky, to visit a honky-tonk. It is considered by many to be the most haunted place on earth.

The team visits a condemned building in Ione, California. It has dark history as a former reformatory that housed angry juvenile offenders and abandoned children.

Josh treks deep into Siberia for a site where priceless mammoth bones are mined out of the permafrost. Then, he takes the DNA samples back to the lab.