This six-part serial from the BBC adapted the Francis Durbridge thriller which was serialised in the Radio Times.
Dr Howard Latimer
Stephen Murray Detective Inspector Dane
John Arnatt Nurse Kay
Anne Ridler Ken Palmer
Francis Matthews Laura James
Gillian Raine Geoffrey Windsor
Bryan Coleman Dr George Kimber
Geoffrey Chater Robert Brady
Rupert Davies Grace Frobisher
Ena Moon Charles Kaufmann
Marvin Kane Frieda Veldon
Marianne Brauns Walt Armstrong
Victor Brooks
