- One of 26 episodes from Season Four which are not yet on DVD
- Remastered audio and video from VHS
- FULL-LENGTH EPISODE with scenes missing from SciFi Channel version
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Informed that one of the crew is an impostor, Nelson tries to break down the most probable suspect: Crane (David Hedison).
Nelson: Richard Basehart. Morton: Bob Dowdell. Kowalski: Del Monroe. Sharkey: Terry Becker. Patterson: Paul Trinka.