Continuity mistake: When Thunderbird 2 leaves the hangar on Tracy Island, it appears that Pod 3 has been selected (Pod 2 is visible to the right of Thunderbird 2), yet when Virgil and Brains arrive at Mount Arkan, the Transmitter Truck emerges from Pod 6. (The same continuity error also occurs in the episodes 'Vault of Death', 'Move - And You're Dead', 'Martian Invasion', 'The Perils of Penelope' and 'Day of Disaster', probably due to the same footage being re-used for those episodes).
Character mistake: During the television report about the Sun Probe, a diagram shows the solarnauts' control cabin within the Probe Module. But we later see that the control cabin is within the body of the Probe Rocket when the Module is fired into the solar prominence.
Continuity mistake: When Virgil radios to Jeff that he is about to land on Mount Arkon, Jeff asks him what the weather's like, to which Virgil replies: "Pretty stormy, Father. Pretty stormy." Then we cut to an exterior of the airborne Thunderbird 2, which is absolutely covered in snow. Just moments later we get a long shot and suddenly Thunderbird 2 is no longer covered in snow. We then get a close-up of the cockpit view, where we see Virgil and Brains, and Thunderbird 2 is covered in snow again. We soon get another couple of shots where it alternates between Thunderbird 2 not snow-covered and then being covered in snow again. (00:28:00)
Continuity mistake: When Alan, Tin-Tin and Scott are lowered while on the settee to enter Thunderbird 3, looking head-on at them we have the three of them sat in that order from left to right as they descend the shaft. However, when it cuts to the long shot, Alan and Scott have magically swapped places. When they are fully raised into Thunderbird 3, Alan and Scott are back in their original positions on the settee. (00:18:50)
Audio problem: When Jeff says "Scott, Alan, Tin-Tin" after hearing from the TV Reporter that all hope is fading for Thunderbird 3, the words don't match his lips.
Continuity mistake: When we see Tin-Tin passed out on the table when Thunderbird 3 is on a collision course with the Sun, the style of writing of the "Safety Beam" and "On" and "Off" on the control panel change between shots.
Character mistake: When Brains is playing chess with Braman at the end of the episode, the positioning of the chess board is incorrect, as for both players there is a white square in the bottom left corner.
Continuity mistake: When we see a shot of Thunderbird 3 in space on its way to saving the Sun Probe, the "Thunderbird" logo on its side is missing. It reappears later on in the episode.
Audio problem: At the start of the episode, Colonel Benson is voiced by David Graham. But when he appears on TV, asking for International Rescue's help, he is voiced by Ray Barrett.
Continuity mistake: When Alan goes down in the elevator to turn off the safety beam, there is very little sweat on his face, but after a quick cut of his blurred vision, we cut back to Alan, and there is more sweat on his face than there was in the previous shot.
