If I'd been a Whovian as a kid, I would have been obsessed with this story. The Rani's back! And she dresses up as Mel! And she helps the Doctor choose his new outfit! And the Tetraps are the most adorable monsters since the Daleks! (Sorry, The Meep.) And Wanda Ventham's back in yet another fabulous role!

But then... there are three more episodes. The story simply can't sustain that long a script. They should have cut this to 3 episodes and given Delta a fourth. The Rani also isn't as entertaining when she's not fighting with the Master for dominance nor pulling the wool over the Doctor's eyes, and she ends up being a waste of a great actor on a pretty pedestrian villain.