Horror Planet (1981)
"Inseminoid" (original title)

R  |   |  Horror, Sci-Fi  |  November 1982 (USA)
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Ratings: 3.5/10 from 1,980 users  
Reviews: 61 user | 56 critic

A crew of interplanetary archaeologists is threatened when an alien creature impregnates one of their members, causing her to turn homicidal and murder them one by one.



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Complete credited cast:
Robin Clarke ...
Jennifer Ashley ...
Barrie Houghton ...
Karl (as Barry Houghton)
Rosalind Lloyd ...
Trevor Thomas ...
David Baxt ...
John Segal ...
Kevin O'Shea ...


A group of scientists are working in a lab located on a distant planet. One of them, Sandy, is attacked, raped and impregnated by a monstrous creature. She then begins to stalk her colleagues one by one, killing them and drinking their blood. Written by Marty McKee <mmckee@soltec.net>

Plot Summary | Add Synopsis


A Crawling Terror From The Depths Of Doom ... See more »


Horror | Sci-Fi


R | See all certifications »

Parents Guide:





Release Date:

November 1982 (USA)  »

Also Known As:

Horror Planet  »

Box Office


$2,000,000 (estimated)

Company Credits

Production Co:

Show detailed on  »

Technical Specs

Sound Mix:


Aspect Ratio:

2.35 : 1
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Did You Know?


Originally Norman J. Warren wanted orchestral sound, but because of a lack of budget John Scott suggested electronic synthesizers. See more »


When everyone has blocked themselves into a control room, Sandy decides to blow the door in with explosives near by. When the door flies off, it blows outwards towards her in the corridor, not inwards. See more »


Gary: Damn you woman.
See more »


Referenced in Fear, Panic & Censorship (2000) See more »

Frequently Asked Questions

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User Reviews

Gory British "Alien" copy
27 July 1999 | by (Illinois) – See all my reviews

Yes, indeed, the bloody British have done it again, and I literally mean "bloody". It's a low-budget ripoff of "Alien", one containing plenty of gory holes, limbs and entrails. Although the sets and visual effects are cheap-looking, the screenplay causes its characters to behave foolishly most of the time, and the electronic score may drive you mad, director Warren keeps up a brisk pace to prevent you from becoming bored, while Geeson delivers a pretty chilling performance.

3 of 3 people found this review helpful.  Was this review helpful to you?

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