Revealing mistake: In the bakery, Will plays a lively tune on the concertina - without touching any of the button-keys necessary to play the notes. (00:26:15)
The Architects of Fear - S1-E3
Revealing mistake: In this episode's present-day 1963, the scientists view film footage said to have been taken "yesterday." But the rather obvious crowd scene stock footage is ten years old, featuring cars and clothing no newer than 1953. (00:02:00)
Revealing mistake: When the alien posing as a human is exposed, the OBIT screen shows his "true" alien form while he continues to appear human to the naked eye. The actor in alien costume on the screen copies Jeff Corey's movements, but at one point rather badly shatters the illusion by forgetting to raise his arms when Corey does. (00:47:00)
Revealing mistake: The injured Spain falls and tries to crawl away from the alien, leaving handprints in the dust on the floor. Just to his left, you can see several handprints already on the floor from previous takes. (00:47:30)
The Guests - S1-E26
Revealing mistake: The actress is playing chord progressions on the piano. As the camera starts to pan away, she takes her hands off the keys entirely - but the piano chords continue to play. (00:18:55)
