Avon and Blake work together to fly the Liberator through an orange whirly thing in space. Oh wait, since this is a Terry Nation episode that should be a space orange whirly thing.
Avon is busy trying to fix the computer when Gan comes in and fights him, causing Avon to make a number of amusing faces.
After this, Avon decides to leave the Liberator for a new life of not getting into fights with Gan.
"Staying with you requires a degree of stupidity of which I no longer feel capable."
Avon soon has a new friend, but he doesn't get on with Farren as well as he did with Blake. You can see that in their body language here. It's just not the same.
By the end of the episode Avon is back where he belongs, by Blake's side.
The baddy in this episode is Professor Kayn, played by Julian Glover. He likes having hands (with thumbs on them) and his sidekick is Leslie Phillips.