Continuity mistake: When Thunderbird 2 leaves its hangar, it has a small "Thunderbird 2", but when we see the craft in the air, the "2" has changed to a larger font.
Continuity mistake: As Thunderbird 2 attempts to deflect the course of the KLA satellite, all the damage and charring that occurred to the satellite in the explosion earlier has disappeared, and even the attennae has been straightened.