Thrill-seeker Christine Granville offers to ski across enemy lines and over the deadly Carpathian mountains, into Nazi-occupied Poland to gather intelligence for the British. Churchill would later call her his favourite spy.
Helena Bonham Carter shines a light on extraordinary stories from World War Two. Join her for incredible tales of deception, acts of resistance and courage.
A BBC Studios Audio production for BBC Radio 4 and BBC Sounds.
Producer: Suniti Somaiya
Edit Producer: Melvin Rickarby
Assistant Producer: Lorna Reader
Executive Producer: Paul Smith
Written by Alex von Tunzelmann
Commissioning editor for Radio 4: Rhian Roberts
History's Heroes