Doctor Who

Season 18, Episode 9

Episode Title: Full Circle (1)

Air Date: 1980-10-25

Overview:

Deep space, an unknown time - on course for Gallifrey, the TARDIS passes through a strange disruption. When they materialise, the scanner shows the Time Lord homeworld... but the travellers have passed into the negative pocket universe of E-Space and are in fact on the planet Alzarius, where evolution works very differently...