Alien Terror (1971) — Where to watch: streaming availability & viewing options
Quick overview
Alien Terror (1971) leans into its genre DNA with a straightforward setup and a clear, watchable rhythm. It favors steady pacing and a few well-timed beats over constant escalation, which makes it easy to follow. The cast—featuring Boris Karloff, Enrique Guzmán, and Christa Linder—helps anchor the story and sell the character chemistry. Ratings hover around 7.6/10, and it’s likely to land best with fans of the genre. Streaming, rental, and purchase options can change by region and date—check this page for the latest availability.
Alien Terror (1971)
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Released: April 1, 1971
Runtime: 90 min
: 7.62/10 from 25 votes
Near the end of the 19th century, Prof. John Mayer and his assistant, the scientist Dr. Isabel Reed, accidentally invent a powerful ray. An alien travels to Earth to destroy the machine since it would be a threat to the universe. He initially possesses the mind of Thomas, a sex maniac and serial killer, to get close to Mayer during the demonstration of the machine to scientists and the military. Mayer's niece, Laura, meets an acquaintance of her uncle, the chemist Dr. Paul Rosten, and Mayer invites him to join the research. When Thomas gets close to Mayer, the alien also possesses his mind in order to destroy the device and his notes. Meanwhile, Thomas is not able to control his murderous impulses and attacks several women with a straight razor.
Streaming availability
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