This would have been the second story in Colin Bakers 'cancelled' season.

The Doctor and Peri take a holiday, but the planet they've choosen is being plagued by a hate ray.

It takes a long time before the Doctor and Peri get to the planet - over 30 minutes into the episode (one if the issues, when they went to 45 minute episodes).

One part of the story is where the armoury is left unguarded and Locas decides to enter with Peri, even though doing so is againt the law on pain of death - so its seems like a very strange thing to do, especially as they get caught and are sentenced as such. There are a couple of moments where the actions of characters don't quite make sense, but I can give leeway since this was written for TV and mabe they wanted to keep it as close as possible to what would have been.

It kind of has a comic book feel it it - the hate ray and the villain - Mordant cackling away, watching the events he's instigating from his hideaway. I always imagined this story had more significance to it 'The Ultimate Evil' it has a end of series feel to it, but maybe its title that is very similer to 'The Ultimate Foe'.

I found some of resolutions to be a little unsatisfactory, but otherwise it was Ok. It seems to have been poorly recieved, but given that I'm interested in how the lost series 23 would have been, then it does the job. To be honest I've heard far worse original Big Finish releases.