A petty thief breaks into the home of a psychiatrist and gets caught in a web of a doctor who wishes to experiment on him and a doctor's wife who wishes to seduce him.
| Actor | Role |
|---|---|
 Dirk BogardeFrank Clemmons | Frank Clemmons |
 Alexis SmithGlenda Esmond | Glenda Esmond |
 Alexander KnoxDr. Clive Esmond | Dr. Clive Esmond |
 Hugh GriffithInspector Simmons | Inspector Simmons |
 Patricia McCarronSally Foster, maid | Sally Foster, maid |
 Maxine AudleyCarol | Carol |
 Glyn HoustonBailey | Bailey |
 Harry TowbHarry, second criminal | Harry, second criminal |
 Russell WatersManager of Pearce & Mann | Manager of Pearce & Mann |
 Billie WhitelawReceptionist at Pearce & Mann | Receptionist at Pearce & Mann |
 Fred GriffithsTaxi Driver | Taxi Driver |
 Esma CannonScrubwoman with ladder | Scrubwoman with ladder |
| RRoss ParkerBarman (uncredited) | Barman (uncredited) |
| JJimmy ChartersNot listed | Not listed |
| MMartin LyderNot listed | Not listed |
| JJohn LynnNot listed | Not listed |
| JJim TysonNot listed | Not listed |
| HHarry Van EngelNot listed | Not listed |