Being allies does little to discourage Moscow from recruiting double agents in the British establishment. The most famous of them all, Kim Philby and the Cambridge Five, penetrate deep into MI5, MI6, and Bletchley Park. With friends like the NKVD, who needs enemies?

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Hosted by: Astrid Deinhard
Director: Astrid Deinhard
Producers: Astrid Deinhard and Spartacus Olsson
Executive Producers: Astrid Deinhard, Indy Neidell, Spartacus Olsson
Creative Producer: Marek Kamiński
Community Management: Ian Sowden
Written by: James Newman
Research by: James Newman
Map animations by: Daniel Weiss
Map research by: Sietse Kenter
Edited by: NN
Artwork and color grading by: Mikołaj Uchman
Sound design by: Marek Kamiński
Colorizations by:
- Mikołaj Uchman
- Daniel Weiss

Special thanks to supporters:
Kelley Laughlin
jaicne

Source literature list: http://bit.ly/WW2sources
- Ben Macintyre, A Spy Among Friends: Kim Philby and the Great Betrayal, Bloomsbury 2000
- Max Hastings, The Secret War: Spies, Codes and Guerrillas 19391945, HarperCollins Publishers, 2015.
- Keith Jeffery, The Secret History of MI6, Penguin 2010

Archive footage: Screenocean/Reuters - https://www.screenocean.com

Image sources:
- Portrait of Anthony Blunt courtesy of
- Hammer and Sickle with Red Star courtesy of Jorko2009
- Europe 1933 credit David Rumsey Historical Map Collection
- Women working in Bletchley Park courtesy of Bletchley Park Trust
- Imperial War Museusm: WPN 109
- Icons from the Noun Project: Chandelier by Vectors Point, Glass by art shop, Champagne By Pete Baker

Soundtracks from Epidemic Sound:
- Break Free - Fabien Tell
- Last Point of Safe Return - Fabien Tell
- London - Howard Harper-Barnes
- March Of The Brave 4 - Rannar Sillard
- March Of The Brave 10 - Rannar Sillard
- Other Sides of Glory - Fabien Tell
- Please Hear Me Out - Philip Ayers
- Potential Redemption - Max Anson
- Remembrance - Fabien Tell
- Sailing for Gold - Howard Harper-Barnes
- The End Of The World 2 - Håkan Eriksson
- The Inspector 4 - Johannes Bornlöf
- Weapon of Choice - Fabien Tell

A TimeGhost chronological documentary produced by OnLion Entertainment GmbH.