•
Emma Appleton as Feef Symonds, a young, naive and intelligent upper-class civil servant in the
Cabinet Office, recruited as an agent by the United States
Office of Strategic Services (OSS) •
Luke Treadaway as Hugh Fenton, a
Labour Party Member of Parliament for a constituency in Derbyshire, and
Royal Tank Regiment veteran •
Michael Stuhlbarg as Thomas Rowe, a senior American
agent handler of the OSS •
Keeley Hawes as Priscilla Garrick, a senior civil servant of the
Cabinet Office •
Brandon P. Bell as Jackson Cole, an American army driver and Rowe's assistant at the OSS •
Matt Lauria as Peter McCormick, an American army soldier and a staff of the OSS •
Greg McHugh as David Hennessey, a civil servant in the
Ministry of Housing •
Jamie Blackley as Freddie Symonds, Feef's brother, a
closeted gay man, and an unsuccessful
Conservative Party parliamentary candidate •
Danny Sapani as Richard, an American communist living in London •
Bijan Daneshmand as Abu Selim, Minister from the Arab League addressing the Cabinet Office == Music ==