21. Scott Alan Woodard: I, Davros: Part 4 — Guilt
22. Lance Parkin: Davros
23. Nicholas Briggs: The Davros Mission
24. Scott Alan Woodard: The Juggernauts (2005)
Mel is separated from the Doctor after an emergency and ends up in the small mining colony Lethe, working in robotics for the genial (in all senses) Dr Vaso. Meanwhile, the Doctor has been forcibly recruited by the Daleks to neutralise a threat to their survival that's being created on Lethe. When he arrives, he immediately recognises Vaso as an old acquaintance... But why can't anyone else see who he is?
Some good ideas and really good acting suspended in a framework of logical gaps. Not essential.