All episodes

Sir David reveals the legendary characters, audacious missions and makeshift methods of spying's early days, and uncovers the real heroes and heroines who were pivotal to Allied victory in World War I.

Sir David lifts the lid on true stories of unbelievable heroism in World War II and explores a world of cold-blooded assassins, crack saboteurs, elite commandos, real-life super-villains and the ultimate femmes fatales. With unique access to the UK Defence Academy, Sir David uncovers the astonishing true stories of the World War II super-agents whose exploits and tales of derring-do could have come straight from the pages of a Bond novel.

Sir David finds out how the best brains in Britain were recruited to help win a very secret war. From high-tech intelligence to undercover ops, he reveals how the real Qs of World War II defeated Hitler with their ingenious problem-solving and cutting-edge designs. A recently discovered cache of top-secret drawings reveals how Nazi tech boffins plotted to attack Britain on home soil.