The one where nobody's ever quite sure who is Who...
I love Sarah's complete demolition of the Doctor's plan at the top of this episode, in which she points out that, by zooming down to Earth in the Kraal pods, they could be either burnt up in re-entry, suffocated on the way down, or smashed to a pulp on landing. The Doctor refers to these as "tiny flaws", but despite them, Sarah remains as faithful as ever, resigned to the fact it's their best option. "How long before we start all this?" she moans. As ever, Sarah Jane Smith says it like it is.
The Space Defence Station's control room is as wonderfully Doctor Whoey as I expected. Staffed by just four people (one of whom is, refreshingly, a lady of Asian descent), the vast room is quite the opposite of the hubbub of activity you'd expect a space control room to be. And now that we're seeing the real Devesham on the real Earth, we finally get to see the real Mr Benton. Although we think we're seeing the real Harry Sullivan at this point, actually we're not, and he doesn't truly appear until Ian Marter's very last scene at the end of the episode.