The Doctor and Romana find themselves slumming it in a pocket-sized parallel universe.

Worse still, they land on the home world of - loathe him or hate him - that Alzarian irritant, Adric. Chuck in a few indecisive Deciders, some evolving arachnids and a bunch of amphibian Gumbies, and it's another trying jaunt for our two intrepid Time Lords.

This episode can also be found at iTunes/Apple Podcasts, Spotify, Audible and all other podcatchers (as far as we know).