L'assassin habite... au 21
(Original title)
El asesino vive en el 21
Argentina
Der Mörder wohnt Nr. 21
Austria
O Assassino Mora no 21
Brazil
Убиецът живее на Nr. 21
Bulgaria (Bulgarian title)
The Murderer Lives at Number 21
Canada (English title)
L'assassin habite au 21
Canada (French title)
Det skete i Nr. 21
Denmark
Murhaaja asuu numerossa 21
Finland
Mördaren utan ansikte
Finland (Swedish title)
L'Assassin habite au 21
France
Der Mörder wohnt in Nr. 21
Germany
O dolofonos katoikei sto 21
Greece (transliterated title)
A gyilkos a 21-ben lakik
Hungary
L'assassino abita al 21
Italy
犯人は21番に住む
Japan (Japanese title)
El asesino vive en el 21
Mexico
De moordenaar woont op nr. 21
Netherlands
Morderen bor i nr. 21
Norway
Morderca mieszka pod 21
Poland
O Assassino Mora... no 21
Portugal (literal title)
Asasinul locuieste la nr. 21
Romania
Убийца живет в доме... No 21
Soviet Union (Russian title)
El asesino vive en el 21
Spain
L'assassí viu al número 21
Spain (Catalan title)
Mördaren utan ansikte
Sweden
The Murderer Lives at Number 21
UK
The Murderer Lives at Number 21
USA
The Murderer Lives at #21
USA (alternative transliteration)
Вбивця живе в домі... #21
Ukraine (new title)