John Mills
— Dr. Howard Latimer
Derek Farr
— Kenneth Palmer
Noelle Middleton
— Laura James
Wilfrid Hyde-White
— Maj. Harrington aka Robert Brady
Roland Culver
— Detective Inspector Dane
Mervyn Johns
— Dr. George Kimber
Rène Ray
— Mrs. Ambler
Lionel Jeffries
— Geoffrey Windsor
Lisa Daniely
— Frieda Veldon
David Williams
— The Detective Sergeant
Diana Lambert
— Latimer's Office Nurse
Hal Osmond
— Joe - Golf Caddy