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The Assassination of JFK: In 1963, President John F Kennedy is assassinated. A suspect is captured but investigators and amateur sleuths still investigate alternative theories. (S4, ep 3)

Kursk: Hitler's plan for European domination led his new generation of tanks to the Soviet town of Kursk in July 1943. Witness extraordinary colourised footage of the battle. (S1, ep 4)

Secrets Of The Mummies: Experts investigate the mysterious origins of mummification. Could this global practice be proof that aliens once visited Earth? (S7, ep 6)

Alien Messages: Could extraterrestrials have left us clues to the universe's mysteries? Experts investigate cryptic puzzles that might have been left by ancient aliens. (S7, ep 7)

The Colchester Siege: The River Hunters hit the oldest town in Britain, searching the town's historic waterway for evidence of the Siege of Colchester. (S2, ep 5)

Dorset: Andy heads to the home of palaeontology on the Jurassic Coast and braves the collapsing cliffs of Lyme Regis to bring back one of its many fossils. (S1, ep 10)

Crash and Retrieval: The team head to Mexico to the site of an alleged international incident involving the remains of a UFO wreck. (S1, ep 6)

Orb & Crash Debris, KGB UFOs and Aliens, and Superhuman reflexes: Is the strange silver orb in the sky a UFO? And is an infamous spy organisation's footage of aliens real? (S4, ep 4)

The Great Flood: Experts find evidence suggesting that ancient aliens saved humanity from great floods sent by the gods. Can we rely on extra-terrestrials to save us again? (S7, ep 8)

The Vanishings: Experts explore the disappearance of civilisations throughout time and across the globe. Could clues left in their wake point to an otherwordly explanation? (S7, ep 9)

The Lost Colony of Roanoke: In 1587, settlers land on Roanoke Island to establish the first English colony in America, but vanish without a trace and leave only cryptic clues. (S4, ep 4)

Bloody Santa Cruz: Follow a battle for survival in a terrible day of vicious WWII combat, when the USS Enterprise lost many of her crew and her sister ship, the USS Hornet. (S1, ep 4)

Decode the mysterious Arizona desert cypher, discover the lair of the war elephant and beware the zombie village. (S5, ep 17)

The Great Flood: Experts find evidence suggesting that ancient aliens saved humanity from great floods sent by the gods. Can we rely on extra-terrestrials to save us again? (S7, ep 8)

The Vanishings: Experts explore the disappearance of civilisations throughout time and across the globe. Could clues left in their wake point to an otherwordly explanation? (S7, ep 9)

Knaresborough Castle: The final hunt of the series takes the team back to Yorkshire to uncover relics from the brutal 14th Century clashes between the English and Scottish. (S2, ep 6)

Wiltshire: Andy explores Wiltshire's mysterious megaliths and barrows, visits a medieval meadery and encounters a religious pilgrimage at the site of a freshly made crop circle. (S1, ep 6)

The Art and War: After thriving for three centuries, the Celts turned from traders into proven warriors, weapon masters and metal artists in a time that became their golden age. (2 of 3)

Bloody Santa Cruz: Follow a battle for survival in a terrible day of vicious WWII combat, when the USS Enterprise lost many of her crew and her sister ship, the USS Hornet. (S1, ep 4)

Beastly Howls, Holloman Air Force Base UFO, and the Cabin That Defies Gravity: How does a cabin seemingly defy gravity? And what is the origin of some frightening howls? (S4, ep 5)

North Korea Death Star: Satellites capture startling images of a structure in North Korea that may be sinister evidence of a looming nuclear threat. (S6, ep 3)

Invasion Texas 2008: The UFO Hunters travel to Stephenville, Texas to investigate multiple reports of strange lights in the sky. (S1, ep 7)

Death & the Afterlife: Explore the Ancient Egyptians' obsession with death and the afterlife by using cutting-edge new science to expose secret artefacts and rituals. (S2, ep 2)

Bloodsports: Explore the origins of history's deadliest games, from Roman bloodsports to Russian roulette. (S1, ep 8)

The Lost Colony of Roanoke: In 1587, settlers land on Roanoke Island to establish the first English colony in America, but vanish without a trace and leave only cryptic clues. (S4, ep 4)

Ruins: Archaeologists examine new evidence uncovered in Turkey that may reveal more about the notorious tale of the Trojans.