Four further episodes chronicling Captain Scarlet's on-going battle with the Mysteron marauders. 'Renegade Rocket' sees the Mysterons gain control of a Variable Geometry Rocket. 'Crater 101' has Scarlet, Blue and Green perform a dangerous mission on the moon. 'Shadow of Fear' finds Spectrum employing a satellite to spy on the Mysteron activity on Mars. And 'Dangerous Rendezvous' has Spectrum and the Mysterons try to negotiate a peace agreement.