With James Olson, Tim O'Connor, Michael Sarrazin, Cliff Potts, Christine Belford, George Peppard, James McEachin
The Groundstar Conspiracy is a 1972 film directed by Lamont Johnson. It stars George Peppard and Michael Sarrazin. Douglas Heyes' screenplay was adapted very freely from L. P. Davies' 1968 novel, The Alien. It was filmed in Vancouver, British Columbia and produced by Hal Roach Productions in Canada.