Discovery History Tuesday

Astronauts evacuate when a strange mystery object is spotted hurtling through space toward the ISS. Plus, a secret agent tries to recover missing moon rocks

During the fall of Saigon, US helicopter pilots bravely flew through enemy fire to airlift civilians to safety. What impact did Hueys have on the outcome of the war?

Restored footage tells the story of how Hitler ordered Operation Sealion, the invasion of Great Britain, after France had fallen in 1940

New theories claim the sunken city of Atlantis may have been in the Americas. From the Bahamas to an ancient site in Louisiana, Rob and Stefan seek the evidence

Drew Pritchard heads to Edinburgh, where he discovers an antique shop with a deluxe 1940s American bike. Later, he finds a mid-century designer desk in Wookey Hole

Michael and Maria Start restore an unusual 1950's football arcade game. Michael works on the mechanics and Maria knits jerseys for all the players

Bruce Compton dives into the murky secrets of Second World War spies. In Italy, he unearths an iconic code-breaking machine. In the UK the lads revive two rocket launchers

Cutting-edge technology is helping experts investigate the Bermuda triangle. Using new techniques, they search for evidence of aliens on the ocean floor

Possibly the most critical asset on a battlefield are helicopters, considered the backbone of the military. This programme reveals how they help on both land and sea

Drew Pritchard heads to Edinburgh, where he discovers an antique shop with a deluxe 1940s American bike. Later, he finds a mid-century designer desk in Wookey Hole

A French museum asks eccentric military equipment collector Bruce Crompton for help in acquiring an incredibly rare German Panzer 1 tank

Henry Cole and Guy Willison pay a visit to motocross lover Terry in Hereford. He's got everything from perfectly restored motorbikes to a hangar of automotive horrors

Henry and Guy have a rummage in Nigel's sheds in Bexleyheath, where they uncover memorabilia, trinketry and a bicycle that takes Henry back to his childhood.

A strange cave freezes in summer and melts in winter, and a huge sand dune swallows a small child in an instant. Rob and Stefan explore these mysteries

Did Apollo astronauts hear unexplained transmissions on the far side of the moon? Plus, an astronomer spots a strange disturbance in Martian atmosphere

After discovering a 1700s-era cannon, Darrell seeks the ship's origin. Meanwhile, a letter in Gordon's files details a 16th-century wreck connected to Sir Francis Drake

Eccentric military equipment collector Bruce Crompton heads to a Martello Tower on the Channel Islands

In Seaton, Devon, Drew Pritchard dashes under a staircase for a pair of floodlights. In Yorkshire, he uses a penknife to see if a newly upholstered chair hides a valuable original

Rebecca Pritchard entrusts her precious heirloom, a cherub statue affectionately known as Fat Les, to sculptor Nick Elphick who must restore Les back to his best

Henry and Guy are invited to Yeomans in Worcestershire, which is packed to the rafters with classic British motorbikes, but will the boys be able to get any of them running?