I don't especially like this episode. But I am now toying with the idea that the limiter might have been designed by the Federation to do this - it keeps a violent prisoner sedated, but can be triggered to drive him beserk. He can be turned from a meek animal to a killing machine in seconds. It is breaking down insofar as it is not actually being triggered by the Federation (or is it?) but it is feature, not bug.

Interesting theory. I think it credits the Federation with more advanced tech than they actually seem to have - was Gan's limiter experimental? We never hear of anyone else having one, or being threatened with getting one (unlike eg being turned into a Mutoid).

These planets have tiny populations. Jenna says 'population in excess of 7,000,000' as if it was something - but that's about the population of London, isn't it?

That would be my theory. It was an experiment, it didn't work very well, and they shipped the surviving subjects off to Cygnus Alpha.

You reckon there was more than one? Maybe if things had worked out differently on CA, Gan might have found a fellow limitee?

We had an earthquake a few years ago - felt (and sounded) like a truck had come off the road and hit the building. Rated mag 3 it was on the Craven fault, and miles away - wouldn't like to be in anything bigger!

VILA: The trouble with a genius, is you’re never quite sure what he’s up to.

Vila uses this speech to distract Cally and Jenna while he takes a gun from the armoury. Is Vila trying to tell us he’s a genius… Love the irony of this.

Vila's been very on-the-ball in the last few episodes. I like how he moves from being openly scared to doing brave things when needed. He's essentially voicing what they all feel – and he gets Blake to admit – but is getting in first in case he flakes. Last ep and this he doesn't at all.