Doctor Who: Rat Trap

On the day of Margaret Thatcher's landslide second electoral victory, the TARDIS crew find themselves trapped in the tunnels beneath a Welsh castle where sinister scientific experiments have been taking place. There are, as the title of the story indicates, rather a lot of rats in it - giant, intelligent rats, no less - although with little in the way of normal rat sound-effects and no visuals, I suspect you'd have to be really quite phobic about the animals to find this overly disturbing.

The guest cast is larger than usual, but gets whittled down fairly rapidly in the early parts of the story. Once that's out of the way, though, Nyssa and Tegan, in particular, get quite a bit to do, both of them playing to their strengths, and providing differing perspectives on events in the tunnels. Yes, this does mean that they have to be split up early on, as is quite common in this particular set of 5th Doctor audios, but it's done more organically here than usual, and is used to good effect.

Lee has a good grasp of the Fifth Doctor, and keeps up both the action and the more emotional elements of the story. There's also a good guest turn from Terry Molloy - who more usually plays Davros, as he did in the TV series. All in all, it's an atmospheric story with a few twists and turns along the way, and a good use of the full TARDIS crew.