Attack of the Alligators - S1-E23
Continuity mistake: When Jeff and Virgil are talking about how to deal with the alligator situation at the house, Jeff says that Pod 6 would be the best choice. Yet when Thunderbird 2 arrives at the scene, it is not Pod 6 that has been chosen - it is Pod 4.
Continuity mistake: Alan and Scott launched Thunderbird 3 to go to Thunderbird 5 and relieve John from his duties in the space station. You can see John leaving Thunderbird 5 to go with Scott to Thunderbird 3, but when Scott returns to Tracy Island, John is nowhere to be seen.
Revealing mistake: The symbols on the walls of the Zombites' control room are the reverse of the symbol on their helmets.
Character mistake: Tim Casey is a Colonel, but Scott refers to him as a General in one scene.
Continuity mistake: When Thunderbird 2 is inside the hangar, it unloads Pod 1, but the numeral on the puppet-sized pod door in the close-up shots doesn't match the one on the model pod seen in long-shot.
Continuity mistake: When Thunderbird 1 arrives at the danger zone, there are no markings down the length of the vehicle when it lands, but lettering appears after Scott calls for help with his equipment. This lettering is in a completely different font to that seen on the vehicle during the launch sequence.
Continuity mistake: In the Thompson Tower at one point, Blanche and Tommy are sitting on a bench whilst Joe keeps hitting the steel door. When the Tower Control assistant switches on the television, he says "How did they get in there?" and we see a picture of the family. This time, it's a different picture to the one seen before as Blanche and Tommy are not sitting on a bench, and Joe is nowhere near a steel door.
The Perils of Penelope - S1-E3
Deliberate mistake: When Thunderbird 2 lands at the Anderbad Train Station, part of Thunderbird 2 catches fire.
Pit of Peril - S1-E2
Visible crew/equipment: At the start of the episode when there are close-ups of Colonel Sweeney's face, studio lights can be seen in the reflection of his sunglasses.
Pit of Peril - S1-E2
Continuity mistake: Once Frank has started talking for the first time in the episode, he has taken his hat off. Once the Sidewinder has started moving again his hat has reappeared back on his head. The moment it tips on its side his hat is once again off.
Continuity mistake: When the hood parks his car to watch the first Red Arrow crash, there is a white and pink car parked beside him. When he leaves, the white car is still there, but has changed parking lanes and the pink car is replaced with a red car.
Continuity mistake: In one zoomed out shot of Virgil standing beside the tower with the Thunderizer moving closer towards him, he is no longer wearing his raincoat.
Continuity mistake: While Prescott, Dempsey and Kenyon are in the castle, there is a glass, a bottle and another glass (in that order diagonally) in front of Prescott. In a close up shot of him, the green bottle has move several inches to the left.
Continuity mistake: When Gordon is climbing up Fireflash to the cockpit, we see him just about to put the left rubber suckers onto the glass. However, in the close up shot, he is putting it onto the blue metal of the craft.
Other mistake: In one shot of Gordon in Thunderbird 4, the shot has been horizontally reversed.
Other mistake: Every time Thunderbird 3 is used during a mission, members of the Tracy family enter it by being lowered on the settee onto a mini rail system, which takes them to Thunderbird 3's hangar before a pole raises the settee into the ship. However, during the initial descent, there is usually an empty settee that passes behind the descending one carrying the impending Thunderbird 3 crew, to fill in the resulting hole in the floor. If the ascending one passes behind the descending one then there is no way that it could fill that hole as it would be too far back.
Suggested correction: As we see the replacement sofa correctly located, the fault is that we do not see the mechanism for doing this. For example, the poles might have been angled to achieve the effect or the start of the rail track might shift over a bit.
Continuity mistake: The Mighty Atom is brown but changes to gray in closeups.
Attack of the Alligators - S1-E23
Continuity mistake: When Kalp makes his surprise appearance via Lopez's secret waterway, after shooting Scott's gun out of his hand, he holds up a test tube of Theramine. As he says, "Remarkable discovery." in the close-up, the position of Kalp's hand differs. (00:34:10)
Terror in New York City - S1-E4
Other mistake: One of the puppets used in this episode is called "Joe" and is a TV Cameraman. As this particular puppet falls into the cavern, the back of his head can be seen to fall off.
Other mistake: When Lady Penelope is relaxing with Jeff and the other members of International Rescue on Tracy Island, you can see in the lounge the pictures of the Tracy sons are in "Operation Cover-Up" mode, even though there are no other visitors on the island.
