I didn't find this one the easiest to follow. Which is strange given that its directed very nicely and the plot, when you boil it down, is not too complicated. Turlough is still trying to kill The Doctor on The Black Guardian's behest, he makes the TARDIS malfunction and appear on a plague ship that has gone wrong and is holding everyone prisoner, including its guards who require a drug to stay alive and will only receive that drug if they subjugate the infected.

The interplay between the companions and The Doctor continues to be really interesting. I particularly enjoyed seeing Tegan chastise Turlough for being weird - talking about death and asking what it would take for her to kill someone. It was rewarding seeing Nyssa get passionate about wanting to turn the fate of Terminus around, though its a shame that they could only do this as a way of telegraphing that she was shortly to leave The Doctor. It would have been nice to see more of this passion from her in other stories. This is often a relatively passive group of time travellers. The kiss on the cheek from The Doctor at the end was very sweet though (the first time The Doctor has kissed a companion?)