
Exploring some unsolved mysteries from the two World Wars, from platoons that vanished, to alien war machines.
The Germans hear that Polish forces are fighting alongside a huge bear; tales of this beer-swilling, chain-smoking beast terrify them - but incredibly the stories are true.
Looking at Churchill's plan to create a giant ice ship, ghost planes that fly themselves and a Nazi treasure hunt for the Amber Room.
Looking at how to improve their bombs, the US Navy turned to the animal world for inspiration; when 270 men vanished into a cloud, witnesses claimed the soldiers had been abducted by aliens.
Crossword puzzles in a national newspaper begin to attract the attention of MI5 when the answers turn out to be code words for the upcoming D-Day operation.