Agatha Christie's Partners in Crime
The Secret Adversary, Pt. 1
S1 E1:
On a train from Paris, our two intrepid travellers stumble across the murder of a young man and the disappearance of his female partner. Who is Jane Finn and what is the evidence she was carrying that can reveal the identity of a legendary Soviet assassin? Tommy and Tuppence will find that they must risk their lives if they are to find out.