Continuity mistake: When the door of Pod 1 opens after Jeff realises there is a saboteur on board, we see three vehicles in the pod and beside the Monobrake there is a red unit which has a windshield on it. However, when we see Chip appearing in the next shot, the windshield has gone.
Revealing mistake: When Thunderbird 2 returns to its hangar at Tracy Island, smoke can be seen flowing back down into units inside the hangar, revealing that this is simply reversed footage of the regular Thunderbird 2 launch sequence.
Other mistake: When Scott and Virgil are putting Chip to bed towards the end of the episode, the globe in Chip's bedroom is upside down.
Continuity mistake: When Morrison is looking out of the window in Chip's bedroom, he closes the shutters and walks away from the window, but in the next shot he is standing next to Chip's bed.
Visible crew/equipment: When Thunderbird 1 returns to its hangar at Tracy Island at the start of the episode, the wires used to lower the rocket into the hangar can be seen.
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: Throughout series 2, the five pictures of Jeff Tracy's sons on the wall at Tracy Island are completely different to the ones seen in the first series. But when Scott prepares to launch Thunderbird 1, you can see the picture of John is the one seen in series 1.
Other mistake: When Lady Penelope is counting her sheep, Parker had just told Jeff that she has 200,007 sheep. When we see her using the sheep-counter machine its display only has five digits instead of the necessary six. (00:14:35)
Continuity mistake: During the second rescue, Thunderbird 2 releases the pod containing Thunderbird 4 on the water. But when we see Thunderbird 2 next to the collapsing oil rig, the craft can be seen with the pod in it.
Visible crew/equipment: When Hooper says "Sound the alarms!", you can see a hand moving Hooper's legs as he gets up from where he is sleeping.
Continuity mistake: When Thunderbird 4 comes out of the pod with the sealing device, there is a "4" on the back of the craft, but when it goes to clamp the device over the base of the fire jet, the "4" has disappeared.
Audio problem: When the Atom Sub Reefer Captain says "OK, Lieutenant, dive." it is said by Jeremy Wilkin instead of Ray Barrett.
Continuity mistake: When Sir Harry drives Lady Penelope down to FAB1 in his jeep, he is wearing a yellow helmet in the zoomed-out shot. When he is seen in close-up he is no longer wearing the helmet. Then, when the shot zooms out again, he is wearing the helmet.
Plot hole: In order to build up suspense, Virgil and Brains stand on the Crab Logger as its dangerous fuel is pumped out, despite the fact that it is hanging on the edge of a precipice. In fact they could have left as soon as they had plumbed in the pipes to empty the fuel tanks - the whole procedure is controlled by Scott in Thunderbird 1 and they make absolutely no contribution to the operation at all. They do not need to disconnect the pipes; they are left behind and dropped from Thunderbird 1 as planned. They just stand there chatting about how much danger they are in until jumping clear at the very last second. Silly buggers.
Plot hole: Crablogger designer Jim Lucas lives at 75 Sunnigale Road, Eppington Wood East, Somerset, according to the card that Penelope finds in the personnel files at Robotics International, but she reads it out to Parker as "20 Hazlemere Gardens, Iresham."
Continuity mistake: When Lady Penelope is speaking to the security guard at Robotics International, she is initially standing at the far end of the table but in the next shot she is now much closer to the guard.
Continuity mistake: When Jeff is speaking to Virgil and Brains at Tracy Island, Brains can be seen with his right hand on the desk, but when the camera angle changes, he now has his hand by his side.
Continuity mistake: When Parker pours Penelope a glass of sherry, the close-up shots of his human hand show he places the glass directly onto the table, but the wider shots of the puppets show the glass on Penelope's place mat with no time for it to have moved.
Visible crew/equipment: When Penelope pulls the cord to ring the alarm for Parker, look on the right side of your screen and you can see part of a crew man's finger holding Penelope's arm.
Continuity mistake: When we see a close-up of the saucepan containing the 'special' that Maria has prepared, you can see there is one only ladle in the pan, but in the next shot when Maria takes the pan off the stove, a spoon has suddenly appeared.
