The Groundstar Conspiracy

The Groundstar Conspiracy is a 1972 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.

Despite Tuxans brutal interrogation techniques electroshock 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 Nicoles home and begs her to help him remember. But she knows nothing.Eventually the inside conspirators behind the attempted theft are found, and Tuxan reveals the truth to Welles, who still cannot remember any details of the crime. John David Welles actually died en route to the hospital on the night of the explosion. The man we have come to know as Welles is really Peter Bellamy, a government employee who recently lost his wife and son in an accident. Bellamy, feeling that life was no longer worth living and remembering, volunteered to have his memory wiped and to play Welles in order to draw the conspirators into the open. ........

Source: Wikipedia