This movie debut for saucy British TV comic Benny Hill has Benny leaving his job as a sweeper after winning some money. He becomes a private detective and investigates a plot to assassinate British scientists.

Hugo Dill
Frankie Mayne
Zacco
Det. Inp. Hancock
Barakov
Sir Walter
Professor Stumpf
Gruber
Himself
Raymond Courtney
Frankie's Agent
PC Roberts