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)
Revealing mistake: In this episode the aliens with the help of 'turncoat' Turner have frozen a moment in time in which they will attack and destroy SHADO HQ. Everything and everyone is frozen in place - except for the guy in the background walking across the road during Straker's and Turner's 'car' chase in the 'Harlington/Straker' go carts.
Revealing mistake: While Straker, Foster and Dr. Jackson are standing over Catherine's body at the end, the "dead" woman's eyelids are twitching. (00:46:30)
Revealing mistake: Another piece of stock footage used throughout the series was a shot of the shiny metal sign for Harlington-Straker Studios. The clock on the side of a building is reflected in the sign's surface, always showing the same time of day - so it's 1:50 every time Straker drives by. (00:24:00)
Revealing mistake: Straker and Foster take off for the moon in a large red hovercraft which, even though it's launching in broad daylight, doesn't cast any shadow. (00:12:00)
Flight Path - S1-E15
Revealing mistake: When the mobile-units leave the transport carrier, you can see that both are being "driven" by dolls. (00:22:00)
Revealing mistake: Due to re-used special effects footage, the submersible Sky One fighter, whenever it launched from the ocean at night, always took off under a full moon. (00:07:50)