Four further episodes chronicling Captain Scarlet's on-going battle with the Mysteron marauders. In 'Point 783' the Supreme Commander of Earth comes under threat of assassination when he makes ready to reveal plans for a new hi-tech supertank. 'Model Spy' sees Destiny and Symphony angels going undercover as models when the Mysterons take a sudden and unexpected interest in the world of fashion. 'Seek and Destroy' has the Angel Interceptors take on the Mysterons in a tense mid-air dogfight. And 'Traitor' finds Captain Scarlet blamed for a series of hovercraft accidents.