The Three Students

The corpse of a shabbily dressed young woman has been discovered in the mud flats of the Thames at low tide. Police assume she's a prostitute, but Dr. Watson suspects something more and goes to his old friend Holmes, now retired and at very loose ends.

Early in his crime-solving career, Sherlock Holmes attempts to prevent Moriarty from cornering the heroin market.

Faced with two false confessions and numerous suspects after a despised civil magistrate is found shot in the local vicarage, Detective Inspector Slack reluctantly accepts help from Miss Marple.

A thief fresh out of prison, tries to work his way back into the life of his daughter and ex-fiancé. Determined, he is forced to use the skills he has as a gifted locksmith. Things take a tumultuous turn after an unexpected disappearance.

In Acapulco, Hercule Poirot attends a dinner party in which one of the guests clutches his throat and suddenly dies. The causes seem to be natural until another party with most of the same guests produces another corpse.