The part of the American singer was played by Kipp Hamilton, sister-in-law of Carol Burnett.
They don't seem to be afraid of Gaira.
Dr. Paul Stewart: Ah, they're young; young people don't have too much fear... It's strange, you know. Whenever there's a strong evil force around, youth seems to blossom. Like when the Nazi's captured Paris. All of the night ...
Akemi Togawa: ...
The American version mistakenly credits director Ishirô Honda as Inoshiro Honda.
Co-producer Henry Saperstein commissioned an English-dubbed US version using Glen Glenn Sound, a Los Angeles-based company. This version removes references to the preceding film, Frankenstein Conquers the World, with the creatures being referred to as "Gargantuas" instead of "Frankensteins." However, this version also includes additional footage not featured in the original Japanese version, including the scene where Dr. Stewart references a severed hand, supposedly Frankenstein's from the previous film.