The Arrival - S3-E2
Corrected entry: Sheckly is revealed, at the end, to have hallucinated the plane and the entire investigation. How did his hallucination correctly presage the names and faces of the real airline employees, Malloy and Bengston, neither of whom he'd ever met? The Twilight Zone it may be, but unbelievably, Sheckly doesn't even seem surprised at this impossible occurrence. (00:20:00)
Correction: The final scene of the episode shows all the various investigators in an office. It is revealed that Sheckly has been hallucinating the entire investigation of (and this is very important) a plane that had disappeared 19 years ago! Sheckly was accurately able to recreate the plane, situation, and persons involved because they make it very clear that they had all worked with him on the investigation (of the plane he's hallucinating about) but that that occurred "some 17 or 18 years ago..." He isn't hallucinating the people, but subconsciously remembering them. Since it has been almost 20 years since they'd all been together, Malloy doesn't remember who Sheckly is and is reminded by the other investigator. It is never insinuated that Sheckly is a stranger.