Kika Markham

Poirot helps Japp try to find a jewel thief, but is sidetracked when a bewitching Russian countess arrives on the scene.

After a young woman is found brutally murdered on a train, the police call in a brilliant but unstable psychologist to aid in the investigation.

Criminal psychologist Fitz is frustrated when another murdered woman is found and he is ordered off the case. Despite this initial setback, Fitz and DS Penhaligan are determined to find out the truth.