Michael Brewster

Jack Watling

Susan

Carole Lesley

Mrs. Gray

Renee Houston

Sid Johnson

John Slater

Mitchell

Colin Gordon

Mr. Monkton

John Salew

Trixie

Libby Morris

Micki

Cardew Robinson

Walker

Julian Orchard

Rosie

June Cunningham

Judge

Ronald Adam

Colonel Drew

Ernest Clark

Spider

Vic Wise

Grant

Hugh Morton

Barbara Drew

Jeanne Moody

Eastern Gentleman

Marne Maitland

Costume Designer

Tony Thawnton

Large Man

Larry Taylor

Joe

Gertan Klauber

Receptionist

Ruth Lee

Big Louis

John Vivyan

Big Louis

Johnny Vyvyan

Enormous Man

Alf Dean

Barman

Frank Forsyth

Counsel

Geoffrey Denton

1st Inventor

John Watson

Dowager (uncredited)

Diana Chesney

Undercover Detective (uncredited)

Walter Henry

Stage Prompter (uncredited)

Lance Percival