Rat Trap

Captain Scarlet, Blue, Destiny, Harmony and the doc are heading to Mars after Spectrum lose contact with Elysium base on Mars. In orbit they are attacked and crash land the shuttle on the surface of Mars. They take the Bison on head for the base, en route they find another Bison from the base with the crew inside dead. At the base itself they find the entire personal killed. To get off the planet they need to fix the base's shuttle but require a component from their crashed shuttle. Soon they find out what killed them, a robot exploration probe taken over by the Mysterons. A fight en sues and Harmony ends up in a coma. Scarlet and Blue take out the robot and Destiny repairs the base shuttle. They all board and the shuttle blasts off.

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S01E05 - The Homecoming