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)