When four directors of a large business die in mysterious circumstances, Simon finds himself investigating a fiendishly clever murder market - and racing against time to save the life of a fifth director.
Both Sir Richard and Hudson the butler are visited by their brothers. Sir Richard suppresses ill feelings, while Hudson exaggerates his status in the Bellamy household.
Steed and Mrs. Peel try to trap a comic book killer.
The police hunt Steed while Cathy, on the trail of a mysterious package, confronts the people who will kill to keep its secret.
Cathy takes a Turkish bath to help Steed prove the value of good soap.