A member of British Intelligence assumes a fictitious criminal identity and allows himself to be caught, imprisoned, and freed in order to infiltrate a spy organization and expose a traitor; only, someone finds him out and exposes him to the gang...
| Actor | Role |
|---|---|
 Paul NewmanRearden | Rearden |
 Dominique SandaMrs. Smith | Mrs. Smith |
 James MasonSir George Wheeler | Sir George Wheeler |
 Harry AndrewsMackintosh | Mackintosh |
 Ian BannenSlade | Slade |
 Michael HordernMr. Brown | Mr. Brown |
 Nigel PatrickSoames-Trevelyan | Soames-Trevelyan |
 Peter VaughanBrunskill | Brunskill |
 Roland CulverJudge | Judge |
 Percy HerbertTaafe | Taafe |
 Robert LangJack Summers | Jack Summers |
 Jenny RunacreGerda | Gerda |
 John BindonBuster | Buster |
 Hugh ManningProsecutor | Prosecutor |
| WWolfe MorrisMaltese Police Commissioner | Maltese Police Commissioner |
 Noel PurcellO'Donovan | O'Donovan |
 Donald WebsterJervis | Jervis |
| KKeith BellPalmer | Palmer |
 Niall MacGinnisWarder | Warder |
 Eddie ByrneFisherman | Fisherman |
 Shane BriantCox | Cox |
 Michael PooleMr. Boyd | Mr. Boyd |
| EEric MasonPostman | Postman |
| RRonald ClarkeAttendant | Attendant |
| AAntony ViccarsSalesman | Salesman |
| DDinny PowellYoung | Young |
| DDoug RobinsonDanahoe | Danahoe |
| JJack Cooper1st Motor Cyclist | 1st Motor Cyclist |
| MMarc Boyle2nd Motor Cyclist | 2nd Motor Cyclist |
| MMarcelle CastilloMadeleine | Madeleine |