Harold J. Stone portrays FAA investigator Grant Sheckly, who is called in on a most mysterious and perplexing case: a passenger airliner has seemingly landed without incident at an airport, but in reality, all the passengers and crew are missing, making it a ghost plane like the fabled Mary Celeste. Grant(who had one unsolved case on his resume) struggles to come to a logical explanation, along with the other airline personnel, until he hits upon a most fantastic possibility that he will risk all to prove... Uneven episode starts out most promisingly, but final outcome may be a big letdown to some, though this still remains an engrossing outing.