Inseminoid aka Horror Planet – UK, 1981 – reviews and whole film free online

Scream Factory released Inseminoid on Blu-ray on March 10th 2020 and it can be pre-ordered from Special features are as follows:

  • A Very English Exploitation: Inseminoid and the Shock Cinema of Norman J. Warren – 90-minute documentary featuring director Norman J. Warren, actor Jennifer Ashley, visual effects artist Jez Harris, screenwriter David McGillivray, author Kim Newman, and filmmaker Pete Walker (new)
  • Audio interview with director Norman J. Warren (new)
  • Interview with actor Trevor Thomas
  • 2019 Manchester Festival of Fantastic Films Q&A with director Norman J. Warren
  • 2011 Manchester Festival of Fantastic Films Q&A with director Norman J. Warren
  • 2008 Manchester Festival of Fantastic Films Q&A with director Norman J. Warren and producer Richard Gordon
  • Theatrical trailers
  • TV spots
  • Still gallery

Here’s our previous coverage of the movie:

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‘A crawling terror from the depths of doom’

Inseminoid – aka Horror Planet – is a 1981 British-Hong Kong science fiction horror feature film directed by Norman J. Warren from a screenplay by Nick and Gloria Maley, a couple who had contributed to the special effects of Warren’s films starting with Satan’s Slave (1976). The movie stars Judy Geeson, Robin Clarke and Stephanie Beacham.

The film’s soundtrack score was composed by John Scott (Black Rainbow; King Kong Lives; Satan’s Slave; Craze; Symptoms; Trog; A Study in Terror; et al).



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…


Agreeing to provide half of the proposed £1 million budget, the Hong Kong Shaw Brothers became partners in the film’s production. Three weeks of location filming at Chislehurst Caves in Kent preceded a one-week indoor session at Lee International Studios at Wembley Park in London. Gozo, an island close to Malta, was chosen to represent the planet’s surface.


Warren denies claims of that the film is merely an Alien imitation, citing the discrepancies between the production schedules: when Inseminoid entered the shooting stage, Alien, which had been filmed in closed studios, had been released in the Britain months before.

Although the director accepts the often “uncanny” similarities between the films, Alien distributors 20th Century Fox discounted the threat of derivation after watching final cut of Inseminoid: “They agreed it was not an Alien rip-off, and in fact, the head of Fox sent us a very nice letter saying how much he enjoyed the film and wished us luck with the release … I find it flattering that anyone can compare Alien, which cost in the region of $30 million, with Inseminoid which cost less than £1 million. We must have done something right.”

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Reviews [click links to read more]:

“Inseminoid is not a good film, in case you were wondering. It doesn’t make any sense, the costumes are rubbish, the effects are diabolical and the acting (even from the two stars, Judy Geeson and the usually reliable Stephanie Beacham) is atrocious.” British Horror Films

” …the real reason that Inseminoid works comes down to a single performance, that of Judy Geeson. Her Sandy is given a lot of screen time, and she takes advantage of every second; as she oscillates between genuine terror at what is happening to her and the overwhelming alien urge to destroy, Geeson provides a horrifying energy that the rest of the cast simply can’t match.” Daily Dead

“This is all very silly and extremely bloody. Warren’s apparent determination to outdo his previous work in terms of sheer tastelessness results in some astonishingly distasteful scenes – and I don’t mean that in a pejorative way. Every opportunity for a brutal set-piece is seized with both hands and played out with a gorgeous visual style that belies the relatively small budget.” The Digital Fix

Inseminoid is a very fine little movie, I dare to say it’s even underrated. Norman J. Warren did his best with what he had, and gave us a semi-classic that deserves to have a better reputation.” Ninja Dixon

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Main cast:

Judy Geeson (10 Rillington PlaceFear in the Night, A Candle for the Devil), Robin Clarke, and Stephanie Beacham (Dracula A.D. 1972; The Nightcomers; House of Mortal Sin). Victoria Tennant (Alfred Hitchcock Presents, Flowers in the Attic), makes an early film appearance.



Choice dialogue:

Gary: “Get you ass up here on the double? I know what I’d like to do with her arse.”

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Cast and characters [in credits order]:

  • Robin Clarke … Mark
  • Jennifer Ashley … Holly
  • Stephanie Beacham … Kate
  • Steven Grives … Gary
  • Barrie Houghton … Karl (as Barry Houghton)
  • Rosalind Lloyd … Gail
  • Victoria Tennant … Barbra
  • Trevor Thomas … Mitch
  • Heather Wright … Sharon
  • David Baxt … Ricky
  • Dominic Jephcott … Dean
  • John Segal … Jeff
  • Kevin O’Shea … Corin
  • Robert Pugh … Roy
  • Judy Geeson … Sandy

Technical details:

92 minutes 26 seconds – British ‘X’ certificate version

Watch Inseminoid free online via YouTube

2 Comments on “Inseminoid aka Horror Planet – UK, 1981 – reviews and whole film free online”

  1. Warren’s films always strike as great ideas, terrible execution. This is no exception. All manner of great ideas are brought up, then swept under the rug. The crew is the most clueless, helpless bunch of losers ever. Geeson could be killed one million times over, and they botch every turn.

    1. True story: I watched Inseminoid with Norman (and occasional M&M contributor Mark Ashworth) in the Scala Cinema in London’s King’s Cross in the late 80s. Afterwards, Norman looked a little sheepish and said: “It goes on a bit at the end, doesn’t it?”. I replied, “Norman, I’m so glad YOU said that cos it was what i was thinking too.” I still reckon his films are generally enjoyable, especially Satan’s Slave. Michael Gough elevates anything he appears in, even if he hams it up.

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