When the team is getting their orders for the second rescue of the Zero-X crew, Jeff declares that Thunderbird 2's #4 cargo pod carries air-to-air rescue equipment. This is a major goof. Pod 4 is specially equipped with Thunderbird 4's launch ramp. It can carry additional small things as well, but not the equipment Jeff stated.
At Assembly Control, the name of the Zero-X launch site on the map is given as "Glenn Field". However, when Lady Penelope drives into the car park, there is a sign on the gate of the press enclosure that reads "Glenfield".
The planet Mars has a largely red surface, yet here it is depicted with a fairly generic grayish appearance.
When Zero X is on its first launch attempt, as it pitches over due to the failure of the controls, the position of the shadow of the upper lifting body does not change.
When the crash location for Zero-X is plotted, it is a small town in the United States, International Reference 24-04. In the next movie, "Thunderbird 6", the fake captain of the Skyship puts together a message to send International Rescue to an ambush at a disused base in Africa, International Reference 24-04.
Lady Penelope and Parker go after the saboteur who gets into a boat. As the boats starts moving and the bow pitches up, it is possible to see a rod near the front moving the boat along.
The airport security tower opens fire at the car of the fleeing would be hijacker The Hood, but then also inexplicably opens fire on the Rolls Royce of Parker/Lady Penelope when they set off in pursuit.