Plot hole: The alien-possessed Mason steals Captain Lauritzen's fingerprints by pressing his fingertips to the captain's and "heat transferring" the prints. Big problems here: those prints would now be backwards and for the wrong hand. But when the computer later reads the prints, it fails to notice this and passes him through security as "Identity Correct." (00:23:30)
UFO (1970)
1 plot hole in season 1
Starring: Ed Bishop, Michael Billington, Ayshea Brough, Dolores Mantez
Genres: Sci-fi
Revealing mistake: In the interior shots of Mobile 1's cockpit, we see that there's a crew of 3 and that the pilot is black. But in shots of the exterior (miniature model stock footage), there's only one occupant, a pilot, and it's a doll with distinctively Caucasian features. (00:26:30)
Ed Straker: Hello, Miss Ealand. Hard at it?
Miss Ealand: I'm always "hard at it." Sometimes you notice.