What sinister connection lies between a stolen silver chalice, an ornate medieval dagger and a murder in a stately home?

A prominent Cabinet minister dies from an injection on the operating table. But who administered the lethal dose - and why?

When a grand old man of the theatre announces that he is to marry a young and glamorous beauty, someone in his family reacts violently to being disinherited.

During a display of dart throwing in a Cornish pub a man's hand is impaled by a dart, and he dies shortly afterward from cyanide although no one can explain how.

Inspector Alleyn (Patrick Malahide) trails a blackmailer in London high society.

A 1940s whodunnit based on the novel by Ngaio Marsh. When an artists model is murdered in front of the whole class, Inspector Alleyn is sent to investigate.