A man who recently inherited a fortune drops dead in the middle of his speech after the annual family dinner on Christmas Eve. There are six suspects - but which has the strongest motive? The sleuths are Wendy Craig, Leslie Crowther, Patrick Mower and Derek Nimmo.

Actor Norman Bowler and novelist Jackie Collins join regulars Anouska Hempel and Patrick Mower to follow another sprinkling of clues. As always, there are more than a few red herrings.

Many crimes are solved by pure deduction - or a process of elimination. Aimi MacDonald and Alfred Marks are the guest stars pitting their wits against the audience to solve another murder mystery.

A row is brewing within a famous pop group the Weasels. But before the showdown ensues, one of the group is murdered on stage. Guest stars are Paula Wilcox and Richard O'Sullivan.

A murder is committed in a research lab and the only clues are a ring and a matchbox. Scientist Magnus Pyke and actress Polly James put their heads together to try and solve another mystery in which nothing is quite as it might at first seem.

How did a suitcase of clothes become a suitcase of rubies?

The chairman of the board has been murdered. Whodunnit? And how?

The chilling tale of the frozen chef. Who froze him and why? The CIA, MI5 and French security services are the principal ingredients in this mixture of freshly cooked spies. Getting their teeth into the clues are Rodney Bewes and Julie Edge.

Terry Scott and Dilys Laye join the panel to puzzle out 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.

Another mystery to test the sleuthing talents of viewers and panelists including guests Honor Blackman and Leslie Crowther. This time it'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? Guests include Rosemary Leech and Jimmy Jewel.