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The Groundstar Conspiracy (1972)

A government investigator tries to find out the truth behind the break-in at a top secret research facility.


Lamont Johnson


Leslie P. Davies (novel) (as L.P. Davies), Douglas Heyes (screenplay) (as Matthew Howard)


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Cast overview, first billed only:
George Peppard ... Tuxan
Michael Sarrazin ... John David Welles / Peter Bellamy
Christine Belford ... Nicole Devon
Cliff Potts Cliff Potts ... Carl Mosely
James Olson ... Sen. Stanton
Tim O'Connor ... Frank Gossage
James McEachin ... Bender
Alan Oppenheimer ... Gen. Hackett
Roger Dressler Roger Dressler ... Charlie Kitchen
Ty Haller Ty Haller ... Henshaw
Anna Hagan ... Dr. Plover (as Anna Hagen)
Hagan Beggs Hagan Beggs ... Dr. Hager (as Hagen Beggs)
John Destry John Destry ... Zabrinski (as John Destry Adams)
Milos Zatovic Milos Zatovic ... Dr. Zahl
Don Granbery ... Technician (as Don Granberry)


A break-in and sabotage attempt occurs at a top secret research institute and the culprit is cornered and captured. The problem is that he's been badly injured and claims to have lost his memory entirely. A cat-and-mouse game ensues between investigator Tuxan, the mystery intruder Welles and the people who sent him on the mission. Written by Col Needham <col@imdb.com>

Plot Summary | Add Synopsis


only if you like gripping suspense and surprise endings...


PG | See all certifications »



Canada | USA



Release Date:

21 June 1972 (USA) See more »

Also Known As:

The Plastic Man See more »

Filming Locations:

British Columbia, Canada See more »

Company Credits

Show more on IMDbPro »

Technical Specs


Sound Mix:

Mono (Westrex Recording System)


Color (Technicolor)

Aspect Ratio:

2.35 : 1
See full technical specs »

Did You Know?


Due to Carol White's prior commitments she was replaced by Christine Belford in the role of Nicole Devon. See more »


It is assumed that the saboteur has the secret data memorized in his brain, because he has seen it while copying it from a computer to tape reels. In reality, if you know what files you want, you can copy them on magnetic tape without studying their contents. This was also true in 1972. See more »


Tuxan: Yes, gentlemen - I tap my own phone.
See more »


Referenced in Lovelace (2013) See more »

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User Reviews

No-Star Mediocrity, The
5 May 2002 | by JoeytheBritSee all my reviews

When George Peppard is the major ‘name' of a movie – especially one made in the 70's – you may suspect you're on dodgy ground from the off. When his co-stars are Michael Sarrazin – a one-trick pony whose career spiralled downwards sometime around 1975 when the trick had been seen too many times – and Christine Belford – a brief escapee from TV movie hell – you know it for a fact.

THE GROUNDSTAR CONSPIRACY is a far-fetched thriller with sci-fi undertones that moves far too slowly, telegraphs most of it's ‘twists' far too early (apart from the big twist at the end, which, believe me, sends this sad effort way off the credibility meter) and suffers from some horribly clunky dialogue. Perhaps a director at the very top of his game may have been able to salvage something, but, unfortunately Lamont Johnson – another journeyman whose labours have mostly been in television – was never that good a director. Peppard, as a tough, no-nonsense agent, seems to be rehearsing his Hannibal role in THE A-TEAM without the humour, while Sarrazin flashes puppy-dog eyes and tries to look puzzled. Lucky Christine Belford, then: her role calls for her to look bewildered much of the time, and, when she does, she looks completely natural.

Approach THE GROUNDSTAR CONSPIRACY as a mediocre B-movie, ignore its obvious – and woefully unrealised – ambitions, and you may just wring some drops of entertainment from this old flannel.

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