Will Hay
— Dr. Benjamin Twist
Moore Marriott
— Jerry The Mole
Graham Moffatt
— Albert Brown
Googie Withers
— Lottie
Peter Gawthorne
— Sir Cyril
Basil Radford
— Deputy Governor
Wilfred Walter
— Max Slessor
Dennis Wyndham
— Head Warder
Alf Goddard
— Sykes
Basil McGrail
— Bates
Kathleen Harrison
— Mabel
Roddy McDowall
— Jimmy
Teddy Brown
— Slim Charlie
Bertha Belmore
— Tiara Lady
George Merritt
— Patrolman
Roy Emerton
— John Benjamin
Leonard Sharp
— Convict
Garry Marsh
— Johnson