| Compañeros del crimen |
Argentina |
| Compañeros del crimen |
Mexico |
| Compañeros del crimen (original subtitled version) |
Uruguay |
| Escola de Sádicos |
Brazil |
| A Fenyegetés |
Hungary |
| Hvem myrdede Mr. Pelham |
Denmark |
| Katharmata tou mavropinaka (transliterated title) |
Greece |
| Kauhun tyyssija |
Finland |
| Mort d'un prof? |
France |
| Morte di un professore |
Italy |
| Sadistler Okulu |
Turkey |
| Sammansvärjningen |
Sweden |
| Die Satansbrut |
West Germany |
| Studie i terror |
Norway |
| Unman, Wittering and Zigo |
South Africa |
| Unman, Wittering and Zigo |
Australia |
| Unman, Wittering and Zigo |
Canada |
| Unman, Wittering and Zigo |
Spain |
| Unman, Wittering and Zigo |
United Kingdom |
| Unman, Wittering and Zigo |
Ireland |
| Unman, Wittering and Zigo |
India |
| Unman, Wittering and Zigo |
New Zealand |
| Unman, Wittering and Zigo |
USA |
| Zigo... afwezig! |
Belgium |
| Καθάρματα του μαυροπίνακα |
Greece |
| Ужас в училището |
Bulgaria |
| Ужас в школе |
Soviet Union |
| 若いけものたち |
Japan |