Apart from a couple of hovercraft scenes and some explosions when they run out of control and crash, there's not really that much in this episode that is on interest. Of course, as the one and only appearance of the Spectrum hovercraft, this episode deserves a fair amount of attention but it won't 'wow' you like other episodes. Annoyingly, we never find out what caused the fire in Scarlet and Blue's room, even though the list of suspects was hardly very long given that Machen never tried to hide that he hated Scarlets guts. Also, rather anti-climatically, the traitor mentioned in the episode title turns out not to be some Mysteron reconstruction as usual, but a dodge screw from the hovercraft machinery. A fair episode, but pretty boring.
The only downside of this episode was the unneeded flashback scenes from the pilot episode.
At Koala Base, there's a spate of exploding Hoverjets, but what's the cause?
What's interesting in this episode is the paranoia created by the Mysterons.
There's no Captain Black.
The crew of Koala Base think Captain Scarlet is the traitor because of his past 'involvement'...so Captains Blue and Scarlet's room becomes inflamed with fire...