Series C, Episode 13. First broadcast on Monday 31 March 1980.

This week, Si’s acting secretive and is taking the Liberator who knows where, Col told him not to fly through that ominous looking fluid cloud, but would he listen? No! He has to get to Terminal.

Pete’s getting worried, the ship’s systems have started playing up, James has noticed an upsetting green substance oozing out of the walls and consoles.

Mark’s happy though, he finally has possession of the Liberator… it’s time for Maximum Power!