Dirk Bogarde
Dr. Henry Laidlaw Longman
Mary Ure
Oonagh Longman
John Clements
Major Hall
Michael Bryant
Dr. Danny Tate
Wendy Craig
Annabella
Harold Goldblatt
Professor Sharpey
Geoffrey Keen
Calder
Terry Palmer
Norman
Norman Bird
Aubrey
Terence Alexander
Rowing Coach (uncredited)
Grace Arnold
Train Passenger (uncredited)
Timothy Beaton
Paul Longman (uncredited)
Elizabeth Counsell
Girl Student on Station (uncredited)
Roger Delgado
Dr. Jean Bonvoulois (uncredited)
