Edward Judd

Arnold Bedford

Martha Hyer

Kate Callender

Lionel Jeffries

Joseph Cavor

Miles Malleson

Dymchurch Registrar

Norman Bird

Stuart

Gladys Henson

Nursing Home Matron

Hugh McDermott

Richard Challis

Betty McDowall

Margaret Hoy

Erik Chitty

Gibbs (uncredited)

Douglas Ives

Sparks (uncredited)

Peter Finch

Bailiff's Man (uncredited)

Marne Maitland

Dr. Tok, UN Space Agency (uncredited)

Laurence Herder

Glushkov, UN Space Agency

Paul Carpenter

Reporter from the 'Express' (uncredited)

Valentine Dyall

Narrator (uncredited)