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Watch Roger Corman's Frankenstein Unbound online — it may be available on legal streaming platforms such as YouTube, Netflix, Prime Video, Hulu, Disney+, and others.

The ultimate weapon, which was meant to be safe for humankind, produces global side-effects, including time slides and disappearances. The scientist behind the project and his car are transported from the year 2031 to 1817’s Switzerland, where he finds Dr. Victor Frankenstein and his contemporaries.