Other: 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.

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."

Revealing: Near the end of the episode, Thunderbird 2 lands and reverses into its hangar. During this bit, if you look carefully you can see white smoke near the boiler on the far side of the hangar, only this smoke is apparently being sucked into it. This is the usual footage of Thunderbird 2 exiting the hangar played in reverse.

Plot hole: It is supposed to be the middle of the night when Virgil sets off in Thunderbird 2 for Coralville Hospital, but the Thunderbird 2 launch takes place in full daylight.

Factual error: Tin-Tin tears a page off a calendar which shows the date as 2026, but other calendars indicate that Christmas Day falls on a Sunday for this year. In fact, December 25th, 2026 will be a Friday.