Red Dwarf is stolen from the crew and they are forced to survive on Starbug. They go into deep sleep and are revived 200 years later when there is a chance to recapture the ship. In order to gain more ground on Red Dwarf they try to go through an asteroid belt but find that it is inhabited by alien beings called Psirens who use mind control to lure their victims and then suck out their brains. (thetvdb.com)