Thinking about if the Master had kept/gone back for the three people in “Self-Help”:
Silla: well, you see, it started with me seducing the current King of the planet which was very easy, all things considered, given that I simply had to give him comfort after the very unfortunate death of his recent wife. From there I simply poisoned him slowly over a few months and, after our marriage of course, and made myself Queen. Of course, from there I could appoint dear Garf as head of our treasury—
Garf: where I started the process of ‘cooking the books’. Moving money around so no one would notice when I started to secretly embezzle funds out of the government to Lezlee here—
Lezlee: which I used to purchase bombs and weapons for the rebels that I had infiltrated, turning them into a proper terrorist organization, and setting up a huge attack in the main city, bombing the most important and largest buildings in the sector—
Silla: causing complete chaos and destabilization allowing me to declare war and consolidate power exclusively to me with the Master, of course, as my most trusted advisor.
The Doctor: 😰
The Master, wiping away a proud tear: you know, it’s taken many lives but I’m really starting to understand why you keep companions, Doctor. This has been fantastic.