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Release info
The Unknown Terror
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Release Date (3)
Also Known As (AKA) (9)
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Release Date
United States
August 12, 1957
Brazil
May 19, 1958
Sweden
December 1, 1958
Also Known As (AKA)
(original title)
The Unknown Terror
Argentina
Terror desconocido
Brazil
Caverna do Terror
Greece
To mystirio tis mavris frikis
(transliterated title)
Mexico
Terror desconocido
Spain
Terror desconocido
4 more
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By what name was The Unknown Terror (1957) officially released in Canada in English?
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