The Doctor and a newly-regenerated Romana arrive on Skaro and discover that the Daleks are using explosive charges and a group of humanoid slave workers to mine the planet in search of their creator, Davros. A stalemate has arisen in an interplanetary war that the Daleks are waging against the robotic Movellans, and their hope is that Davros will be able to give them the edge.
Starring Tom Baker as the Fourth Doctor and Lalla Ward as Romana.
It's a penny cheaper at Amazon but you don't get the free postage. £4.99 is a bargain for this, lowest price I've seen!