Continuity mistake: When Virgil is seating at the cockpit during the launch sequence of Thunderbird 2, he is wearing the clothes he wears on Tracy Island and his International Rescue costume appears. But when Alan comes down the lift, Virgil has suddenly changed into his IR costume.
Continuity mistake: When Thunderbird 2 lands on the London Heliport, the sky has suddenly changed from daylight to nighttime.
Continuity mistake: When we see a close-up of Light-Fingered Fred in the prison cell, the games of noughts & crosses on the wall behind him are completely different to the ones seen in previous shots.
Continuity mistake: When Parker is sitting at the table waiting for his meal prepared by Lil, you can see that his knife is pointing to the left, but when Lil says "Now listen here, Nosey!" we cut back to Parker, and the knife is now facing straight.
Continuity mistake: When they are travelling the disused London Underground tunnels, Virgil is on the red hoverbike and Alan is on the blue hoverbike. In the next shot, they have swapped bikes, but when they arrive at the bank they have swapped back again.