Terry-Thomas
— Capt. J. (Jeroboam) Barker-Rynde PI
Eric Sykes
— Rumbelow
Lionel Jeffries
— Det. Insp. Hook
Dennis Price
— Dr. Julian Crossley
Moira Redmond
— Frances Roitman
David Lodge
— Richards
Ronnie Barker
— Burton
Hazel Terry
— Mrs. Rachel Crossley
Derren Nesbitt
— Roger Forrester
Anna Russell
— Mrs. Margaret Clifford
Julian Orchard
— PC Lofthouse
Katya Douglas
— Rita
Harry Locke
— Higgins
Peter Butterworth
— Barman