This is a stronger half than the first. They should have been presented as one story.

This was an hour of the master and the doctor trying to one up each other. There are android duplicates of both our hero and enemy - it's all a farce. It's surprisingly comedic and fluffy given the last thing Geoffrey Beevers had been in was the dark and brooding 'Master' many years before. It is a little shallow but good fun.

You get the feeling that the Kralls were originally meant to be the Sontarans (the similarities extend further than Dan Starkey's performance). Not that it's any worse as a result.