| Country | Date | |
|---|---|---|
| West Germany | February 1982 | (Berlin International Film Festival) |
| Sweden | 12 February 1982 | |
| Denmark | 4 May 1982 | |
| USA | October 1982 | (Chicago International Film Festival) |
| Finland | 29 April 1983 | |
| Australia | 15 March 1984 | |
| USA | September 1985 | |
| UK | 1 April 1996 | (TV premiere) |
| Den enfaldige mördaren | Sweden (original title) |
| The Simple-Minded Murderer | International (imdb display title) (English title) / USA |
| Az együgyü gyilkos | Hungary (imdb display title) |
| Den enfoldige morder | Denmark (imdb display title) |
| Prostoduszny morderca | Poland |
| The Simple-Minded Murder | (undefined) |
| Yksinkertainen murhaaja | Finland |
| Plot summary | Box office and business | User reviews |
| Ratings | Awards | News articles |
| External reviews | Main details |