| Country | Date | |
|---|---|---|
| UK | 29 July 1949 | (World Premiere) |
| USA | 24 March 1950 | |
| Sweden | 1 April 1950 | |
| Mexico | 26 May 1950 | |
| Portugal | 20 July 1950 | |
| France | 27 September 1950 | |
| Austria | April 1954 | |
| West Germany | 29 May 1959 |
| Traidor | Brazil / Portugal (imdb display title) |
| Összeesküvők | Hungary |
| Agapisa enan prodoti | Greece (transliterated ISO-LATIN-1 title) |
| Alto tradimento | Italy |
| Der Verschwörer | Austria |
| El traidor | Mexico (imdb display title) |
| Forræderen | Norway (imdb display title) |
| Guet-apens | France |
| Konspiratör | Sweden |
| Traición | Spain |
| Verschwörer | West Germany |
| Plot summary | Box office and business | User reviews |
| Ratings | News articles | External reviews |
| Main details |