Whodunnit?

- Season 3

(1975)

A photographer is poisoned in his darkroom with a chemical used in the development of photographs. A police constable uncovers a story of greed and blackmail.

A racing team owner is killed in his car. Each of his family and colleagues wishes him harm, but which of them cut his brake cable?

A row is brewing within a famous pop group - the Weasels. But before the showdown ensues, one the group is murdered on stage.

A murder is committed in a research lab, and the only clues are a ring and a matchbox.

How did a suitcase of clothes become a suitcase of uncut rubies and emeralds? And whose cases were they?

The Chairman of the Board has been murdered. Whodunnit, and how? Was it a drink? Was it his pills?

The chilling case of a frozen chef; whofrozehim, and why? A story of the CIA, MI5 and the French security services.

This week's puzzle for the panel is a cleverly planned shooting. The gun is found, but all is not as it appears - and the main red herring could be a dead rat. Can you spot the killer?

On a flight from Barcelona to England, there's a murder at 30,000 feet over France.

The managing director is dead. But how did his body get across a freshly painted floor? And whodunit?