Overview
The Groundstar Conspiracy is a 1972 American neo noir crime film directed by Lamont Johnson. It stars George Peppard and Michael Sarrazin.
Douglas Heyes' screenplay (written under his frequent pseudonym, Matthew Howard) 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.
Plot
Employee John Welles attempts to steal rocket booster plans from the Groundstar facility. His attempt goes awry and he is badly disfigured in an explosion and barely escapes. He stumbles to the home of Nicole Devon, and collapses. She calls an ambulance, the authorities are alerted, and soon Welles is operated on, given plastic surgery and interrogated by a hard-boiled government official named Tuxan, but Welles claims to have no memory of his crime. In fact, he claims no memory of his life at all, save for brief dream-like flashes of a woman on a beach and the ruins of a Greek temple.
Despite Tuxan's brutal interrogation techniques, consisting of electro-shock and water submersion, Welles still maintains his story of total amnesia. Tuxan allows Welles to escape, hoping he will lead them to the people behind the attempted theft. Welles goes to Nicole's home and begs her to help him remember, but she knows nothing. They fall in love as Tuxan keeps them under surveillance.
Eventually, the conspirators behind the attempted theft are found and Tuxan reveals the truth to Welles, who still cannot remember any details of the crime. John Welles actually died following surgery the day after the Groundstar explosion. The man we have come to know as Welles is really Peter Bellamy, a government employee whose girlfriend recently drowned in Greece. Bellamy, feeling that life was no longer worth living or remembering, volunteered to have his memory wiped and to play Welles in order to draw the conspirators into the open.
From Wikipedia (CC BY-SA 4.0).