Seasons & episodes
1 season · 6 episodes
Episode 01
The Secret Adversary, Part One
Tommy and Tuppence have a chance encounter on a train with an agitated young woman who suddenly disappears and never returns to her seat.
Episode 02
The Secret Adversary, Part Two
Tommy and Tuppence go undercover; he as a member of Brown's gang and she as a maid to a potential suspect.
Episode 03
The Secret Adversary, Part Three
The Beresfords search for Jane Finn comes to a close, as they uncover the identity of Mr. Brown.
Episode 04
N or M? - Part One
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.
Episode 05
N or M? - Part Two
Tommy and Tuppence turn their attention to their fellow occupants of Sans Souci to find N.
Episode 06
N or M? - Part Three
Tommy has finally found the missing scientist, but they're both being held against their will by M, and still none the wiser as to who N is.
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