Character mistake: When Jeff is on the phone to Washington, thanking them for arranging the Sentinel to pick up Thunderbird 4 and take it to New York, the man in Washington replies, "That's the least we can do, Mr Tracy." So at least one person knows that Jeff is involved with International Rescue. This betrays the secrecy of the organisation that Jeff himself demands.
Character mistake: The situation in this episode is that a clerk, Lambert, is trapped inside a bank vault that is having the air removed. When IR arrives they focus all of their efforts on forcing a man-sized entrance before the air runs out, but don't consider first making a small hole to allow air in, thus giving them plenty of time to create an entrance afterwards.
Character mistake: The end of this episode concerns IR chasing down a copy of the photos the Hood taken of the Thunderbird vehicles. However, they show no concern for being photographed in person, as they're lounging around in casual clothes in the end, on an active film set with cameras everywhere, and no camera detector on their persons.
Character mistake: When Nicky asks Jeff for his wish at the start of the episode, Jeff tells Nicky that he must call him "Santa". But when Nicky says that the Thunderbird 3 launch was the greatest thrill of his life, he calls Jeff "Mr. Tracy".
Character mistake: After the first Fireflash crash, search and rescue tasks are unable to find the wreckage, and John in Thunderbird 5 comments that its position was way off what was reported. However, he never bothers to relay this vital information to the London airport overseeing the rescue effort, and IR never bothers to attempt a rescue of a passenger jet filled with civilians, despite showing on the second crash that they were completely capable to saving them. It's then stated that the crash had no survivors, which the viewer has to lay at IR's feet. Even if they were busy with another rescue at the time, notifying the conventional rescue effort of Fireflash's real position could have saved many lives and given the investigation more evidence to find the problem.