Maaga has allowed the Doctor and Steven to leave the Drahvin ship in order to establish whether the planet really will be destroyed in fourteen dawns. The audience is several steps ahead though – we know that this estimate is wildly optimistic (the planet will actually expire in another two dawns).
Vicki’s been left behind as a hostage, but luckily she doesn’t have to bear Maaga’s company for too long as the others return with news. The Doctor decides to be economical with the truth to begin with and tells Maaga that the Rill’s estimate of fourteen dawns was correct. The only problem is that Maaga then reveals that the repairs to the Rill’s spaceship will also take fourteen dawns.
Maaga once again repeats what almost seems to be a mantra – the Rills are evil and must be destroyed. The possibility of working together to leave the planet never seems to enter her head.
But it’s interesting that despite the fact she seems to loathe the Rills, she’s also picked up a certain amount of information from them – the notion that the planet’s lifespan is limited to fourteen dawns and the time needed to repair their ship, for example. If they’re such implacable enemies it’s a little odd that they’ve been so free with vital information like this.
Maaga is able to winkle out from the Doctor the fact that two dawns is all the time the planet has left to enjoy. So the Doctor and Vicki (with Steven this time left behind as the Drahvin’s hostage) set out to meet the Rills to see if they can speed up the repairs
This is not before time – after all, we learnt early in episode one about them and there’s a strong sense that the story can’t advance until we hear their side of things. But the Doctor, and the story, isn’t inclined to rush so we’ll have to wait until the next episode before the Doctor and Vicki come (sort of) face to face with a Rill.
Whilst the Doctor and Vicki are slowly making their way to the Rill’s spaceship, Steven is attempting to sow discord aboard the Drahvin’s ship. He’s able to easily manipulate one of Maaga’s footsoldiers, but it doesn’t gain him much of an advantage.
Galaxy 4 has long been one of Peter Purves’ least favourite stories, mainly because he believed it was written for Ian and Barbara (and Barbara’s role was then hastily rewritten for him). There’s not a great deal of evidence for that in this episode though. Steven has several very decent scenes – especially when he confronts Maaga – and whilst it’s possible that Barbara could have been as strong, everything we see here is totally consistent with Steven’s already established character.
Little of note happens in Trap of Steel. Events are moving, but we’ll have to wait until the next episode to see how they pay off. Since episode three now exists that’s not entirely a bad thing, but it does mean that Trap of Steel is rather forgettable in its own right.