Season 1

1. The Secret Adversary, Part One

2015-07-26 · 60m

Tommy and Tuppence have a chance encounter on a train with an agitated young woman who suddenly disappears and never returns to her seat.

2. The Secret Adversary, Part Two

2015-08-02 · 60m

Tommy and Tuppence go undercover; he as a member of Brown's gang and she as a maid to a potential suspect.

3. The Secret Adversary, Part Three

2015-08-09 · 60m

The Beresfords search for Jane Finn comes to a close, as they uncover the identity of Mr. Brown.

4. N or M? - Part One

2015-08-16 · 60m

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.

5. N or M? - Part Two

2015-08-23 · 60m

Tommy and Tuppence turn their attention to their fellow occupants of Sans Souci to find N.

6. N or M? - Part Three

2015-08-30 · 60m

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.