Jim Ackland, who suffers from a head injury sustained in a bus crash, is the chief suspect in a murder hunt, when a girl that he has just met is found dead on the local common, and he has no alibi for the time she was killed.
| Actor | Role |
|---|---|
 John MillsJim Ackland | Jim Ackland |
 Joan GreenwoodJenny Carden | Jenny Carden |
 Edward ChapmanMr. Peachy | Mr. Peachy |
 Kay WalshMolly Newman | Molly Newman |
 Joyce CareyMrs. Vinton | Mrs. Vinton |
 Catherine LaceyMiss Selby | Miss Selby |
 Adrianne AllenJoyce Carden | Joyce Carden |
 Felix AylmerDr. Martin | Dr. Martin |
 Frederick PiperDet. Insp. Godby | Det. Insp. Godby |
| JJohn BoxerDet. Sgt. Troth | Det. Sgt. Troth |
 Patrick HoltHarry Carden | Harry Carden |
 George BensonMr. Pope | Mr. Pope |
 Jack MelfordWilcox | Wilcox |
| EEsme BeringerMiss Heap | Miss Heap |
| AAnn WiltonMiss Parsons | Miss Parsons |
 James HayterGarage Man | Garage Man |
| FFrank LingBooking Office Clerk | Booking Office Clerk |
 Juliet MillsChild | Child |
 George WoodbridgeGrey | Grey |
 Philip RayStebbins | Stebbins |
 Edward UnderdownPassport Official | Passport Official |
 John SalewTicket Inspector | Ticket Inspector |