N or M? - Part Three S01 E06

David Walliams (as Tommy Beresford) Jessica Raine (as Tuppence) James Fleet (as Carter) Matthew Steer (as Albert) Paul Brennen (as Lucky) Jonny Phillips (as Whittington) Clarke Peters (as Julius Hersheimmer) Hannah Waddingham (as Blonde Assassin) Madeline Appiah (as Annette) Camilla Beeput (as Jane Finn) Christina Cole (as Mrs Sprot) Aoife McMahon (as Sheila Perenna) Roy Marsden (as Commander Haydock) Ed Speleers (as Carl Denim) Pınar Öğün (as Veronika Urbanowicz) Danny Lee Wynter (as Gilbert Worthing) Andrew Havill (as James Peel KC) Alice Krige (as Rita Vandemeyer) Robert Whitelock (as Conrad) Robert Hands (as Mr Minton) Alyy Khan (as Major Khan) Issy van Randwyck (as Mrs Minton)

based on novel or book cold war undercover agent murder conspiracy costume drama murder mystery