John Mills as Dr. Howard Latimer

Derek Farr as Kenneth Palmer

Noelle Middleton as Laura James

Wilfrid Hyde-White as Maj. Harrington aka Robert Brady

Roland Culver as Detective Inspector Dane

Mervyn Johns as Dr. George Kimber

Rène Ray as Mrs. Ambler

Lionel Jeffries as Geoffrey Windsor

Lisa Daniely as Frieda Veldon

David Williams as The Detective Sergeant

Diana Lambert as Latimer's Office Nurse

Hal Osmond as Joe - Golf Caddy

Gillian Moran as