George Nader

Paul Gregory

Maggie Smith

Bridget Howard

Bernard Lee

Victor Sloane, alias Lee Henderson

Geoffrey Keen

Inspector Scott

Bessie Love

Harriet P. Jefferson

Harry H. Corbett

Sullivan

Lionel Jeffries

Pet Shop Owner (uncredited)

Barbara Hicks

Agnes

Glyn Houston

Box office clerk

Noel Howlett

Uncle Tom Howard