Norman Martell
Helen Martell
Peggy Hill
Dr. Peter Murdoch
Supt. Ross
Simmons, the Producer
Miss Potter
Mrs. Booth
Marshall
Cinema cashier
Cleo
Rehearsal Pianist (Uncredited)
Cinema sales girl (uncredited)
Det. Sgt. Fred Smith (uncredited)
Patrol car policeman (uncredited)
P.C. Williams (uncredited)
Sheila (Party Guest) (uncredited)
Sleeping Man in Theater (uncredited)
Detective Examining Tape-Recorder (uncredited)
Cinema manager (uncredited)
Det. Sgt. Carter (uncredited)
Detective / Fingerprints Officer (uncredited)