Another adventure for everyone's favourite Time Lord. The TARDIS is low on Zyton 7, and the only planet with the ore available is Varos. Upon landing, the Doctor (Colin Baker) and Peri discover a society addicted to real life TV violence, ruled by a corrupt regime. They have to help the rebel Jondar and thwart the Thoros Betan delegate, Sil, in his attempts to obtain the Zyton for his own conglomerate.

The Doctor (Colin Baker) is suffering from some post-regenerative trauma, and, after trying to strangle companion Peri, takes off to a deserted asteroid to become a hermit. There he discovers a plot by the Gastropod Mestor to kidnap two mathematically brilliant twins and shift some planets around in order to release more of his slimy ilk. Obviously he has to be stopped, but is the Doctor up to it? Colin Baker's first outing as the Doctor.