Dirk Bogarde as Dr. Simon Sparrow

Brenda De Banzie as Muriel Mallet

Brigitte Bardot as Hélène Colbert

James Robertson Justice as Capt. Hogg

Maurice Denham as Easter

Michael Medwin as Sub-lieutenant Trail

Hubert Gregg as Archer

James Kenney as Fellowes

Raymond Huntley as Capt. Beamish

Geoffrey Keen as Hornbeam

George Coulouris as "Chippie" the Carpenter

Noel Purcell as Corbie

Jill Adams as Jill

Joan Sims as Wendy Thomas

Cyril Chamberlain as Whimble

Toke Townley as Jenkins

Thomas Heathcote as Wilson

Abe Barker as Old Harry

Frederick Piper as Sandyman

Michael Shepley as Jill's Father

Eugene Deckers as Colonel Perello

Mary Laura Wood as Blonde

Ekali Sokou as Phyllis

Joan Hickson as Mrs. Thomas

Felix Felton as Dr. George Thomas

Diana Dors as Party Guest (uncredited)

Fred Griffiths as Seaman (uncredited)

Carol White as Girl (uncredited)