Jack Watling
Mike Brewster
Carole Lesley
Susan
Renée Houston
Mrs. Gray
John Slater
Sid Johnson
Colin Gordon
Mitchell
Libby Morris
Trixie
Cardew Robinson
Micki
June Cunningham
Rosie
Ronald Adam
Judge
Ernest Clark
Colonel Drew
John Salew
Mr. Monkton
Vic Wise
Spider
Hugh Morton
Grant
Julian Orchard
Walker
Tony Thawnton
Costume Designer
Larry Taylor
Large Man
Ruth Lee
Receptionist
Johnny Vyvyan
Big Louis
Jeanne Moody
Barbara Drew
Marne Maitland
Eastern Gentleman
Gertan Klauber
Joe
Alf Dean
Enormous Man
Frank Forsyth
Barman
Geoffrey Denton
Counsel
John Watson
1st Inventor
Diana Chesney
Dowager (uncredited)
Walter Henry
Undercover Detective (uncredited)
Lance Percival
Stage Prompter (uncredited)