Michael Craig

as Dr. Richard Hare

Virginia Maskell

as Dr. Nicola Barrington

Leslie Phillips

as Dr. Tony Burke

James Robertson Justice

as Sir Lancelot Spratt

Nicholas Phipps

as Dr. Clive Cardew

Carole Lesley

as Miss Kitten Strudwick

John Le Mesurier

as Dr. Mincing

Joan Sims

as Dawn