Killers from Space

Douglas Martin (Peter Graves) is a nuclear scientist working on atomic bomb tests. While collecting aerial data on a United States Air Force (USAF) atomic blast at Soledad Flats, he loses control of his aircraft and crashes. He appears to have survived, unhurt, walking back to the air base with no memory of what happened. At the base hospital, Martin acts so strangely that the USAF brings in the FBI to investigate, thinking he might be an impostor. He is eventually cleared but told to take some time off.