Agatha Christie's crime-fighting duo, Tommy and Tuppence Beresford, solve mysteries and search for enemy spies in 1950s Britain.
Cast:Jessica Raine , David Walliams , James Fleet , Matthew Steer , Paul Brennen , Jonny Phillips , Clarke Peters , Hannah Waddingham , Madeline Appiah , Camilla Beeput , Christina Cole , Aoife McMahon , Roy Marsden , Ed Speleers , Pinar Ögün , Danny Lee Wynter , Andrew Havill , Alice Krige
Tommy and Tuppence have a chance encounter on a train with an agitated young woman who suddenly disappears and never returns to her seat.
Tommy and Tuppence go undercover; he as a member of Brown's gang and she as a maid to a potential suspect.
The Beresfords' search for Jane Finn comes to a close as they finally uncover the identity of Mr. Brown.
Tommy is sent on a secret mission to discover the identity of Soviet spy staying at a seaside guest-house; Tuppence refuses to be left behind.
There is a murder at the local Veterans Ball, as Tommy and Tuppence continue their search for the Soviet spy.
Tommy and Tuppence have to come up with their most ambitious and risky plan yet in order to protect the lives of British citizens.