Alien Terror (1971)
"The Incredible Invasion" (original title)

 |  Sci-Fi, Horror  |  April 1971 (USA)
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In the European village of Gudenberg in 1890, Prof. Mayer and his assistant Isabel have created a powerful ray machine. One of the powerful rays is shot into space and attracts a flying ... See full summary »

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Cast overview, first billed only:
Enrique Guzmán ...
Dr. Paul Rosten
Christa Linder ...
Maura Monti ...
Dr. Isabel Reed
Yerye Beirute ...
Tere Valez ...
Griselda Mejía ...
Sergio Kleiner ...
Rosángela Balbó ...
Martha - mayor's wife
Mariela Flores ...
Deaf-mute victim
Tito Novaro ...
Gen. Nord
Sergio Virel ...
Nathanael León ...
Villager (as Frankestein)
Victor Jordan
Julián de Meriche ...
Visiting dignitary


In the European village of Gudenberg in 1890, Prof. Mayer and his assistant Isabel have created a powerful ray machine. One of the powerful rays is shot into space and attracts a flying saucer. The alien pilot decides that the ray poses too great a threat to the universe and must be destroyed. Sex murderer Thomas is possessed by an alien intelligence and infiltrates Mayer's household; Mayer himself is later taken over by an alien mind. Paul Rosten, a young scientist who is in love with Mayer's niece Laura, arrives. The alien "Mayer" and "Thomas" rig the ray gun to explode, killing all who know its secret. Thomas kills Isabel, but before he can murder Laura, Mayer throws off the alien intelligence and she is saved. Mayer realizes that the ray is too powerful for human use, and he destroys it. The flying saucer departs. Written by Anonymous

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Sci-Fi | Horror







Release Date:

April 1971 (USA)  »

Also Known As:

Alien Terror  »

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Shown in the USA in Spanish language theaters before being dubbed into English and sold to television. See more »


Professor John Mayer: Have you noticed that our bodies are becoming radioactive?
Thomas: Well... yes.
Professor John Mayer: It doesn't bother you?
Thomas: No.
Professor John Mayer: Well, it bothers me.
See more »

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User Reviews

Incredible would be one of the last adjectives in summing up this movie
31 July 2013 | by (United Kingdom) – See all my reviews

Boris Karloff was a great actor, responsible for some of the most iconic performances in the horror genre and most effective in roles that showed menacing and sympathetic sides to his character's personality. Sadly, he was also an actor whose last few films didn't do justice to him or his career. The Incredible Invasion(or Alien Terror) is his last and while it is marginally better than House of Evil and especially Fear Chamber that's not saying much as it is still a mess, if there was a word that this movie is not it's incredible. Karloff of course is the best and only good thing about it, that the role is bigger here already makes it better than House of Evil and Fear Chamber and he performs with class and dignity, which is more than The Incredible Invasion deserved. Apart from Karloff the acting is just amateurish, Yerye Beirute brings unintentional humour in how bad especially he is. The Incredible Invasion is cheap-looking too, you get the feeling from the editing and photography that the movie was done in a matter of days(it mayn't have been but it honestly looks like it) while the sets are tacky and don't exude any atmosphere at all. The music is shrill and strident, while the dialogue sounds incredibly stilted and to even describe the direction is inept is insulting. The story has a cobbled together feel with no thrills, tension, scares or suspense despite having the elements that had the potential to make it so. Instead it was dull, often incoherent, thinly structured and far too strange for its own good. All in all, just a mess. Boris Karloff had a great career, but The Incredible Invasion was a very sad end to it, easily one of the absolute worst final films of any actor. 2/10 Bethany Cox

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