Day 286: The Mind of Evil Episode 4

There's a fantastic scene at the start of this episode. Last week's cliffhanger was the Master putting the Doctor under the Keller Machine, with the Doctor under extreme pain because of this fact. The cliffhanger is resolved by the Master turning off the machine and walking over to the Doctor. He feels the Doctor's hearts and discovers that one of them has stopped beating. So the Master resuscitates him and then attempts to convince him both that he should help with the Master's nefarious scheme and also that the Doctor has the power to control the machine. This reveals the complex Doctor-Master relationship, as we see that both are not in complete opposition, instead they are two characters who are keen to convince the other of the virtues of their way of life. And at the end of the day, they both care for each other too much to let the other one truly suffer, instead just leaving them to be prisoners whilst they carry out their own plans. It's a fascinating dynamic, and shows the power of the new villain that we've got in the series.