* John Mills as Philip
* Ann Todd as Ann
* Raymond Huntley as Mr. Kemp
* Clive Dunn as Harry
* Jack Watling as Joe
* Hugh Griffith as Dr. Evans
* Michael Gough as Mr. Baxter
* John Laurie as Sergeant
* David Tomlinson as Harold
* Ernest Thesiger as Professor
* Anthony Dawson as Waiter
* Frederick Piper as Headwaiter
* Peter Illing as Mr. Brown
* Amy Veness as Mrs. Brown
* Barbara Everest as Mrs. Kemp
* Nancy Roberts as Sister
* Peggy Cummins as Woman in Club
* George Merritt as The Blind Man
* Charles Lloyd Pack as Man in Bar
* Patrick Barr as Barman
* Miles Malleson as The Doctor
* Frederick Valk as The Man in the Black Hat
* Aubrey Mallalieu as Police Sergeant
* Harry Baird as Police Constable
* Michael Shepley as Police Inspector
* Peter Bull as Mr. Roper (uncredited)
* Wilfrid Hyde-White as (uncredited)
* Jack Lambert as (uncredited)
This list includes both credited and uncredited roles.