- As the Shell People are attacked by a giant turtle, the women call it "Achelon" which is the real scientific name for the animal.
- Robert Brown (Akhoba) wears makeup identical to that worn by Lon Chaney Jr. wore in the same role in the 1940 version (One Million B.C. (1940)).
- The exterior scenes were filmed in the Canary Islands in the middle of winter.
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