Pt. 2 because I have issues to sort through
The Master and the Doctor ending up in the Toymaker's domain together;
The Master and the Doctor going through a serie of rooms where they have to contemplate the decisions they took back when they lived in Gallifrey;
The Doctor walking to a peculiar door that reminds them of a feeling or rather a scene they can't put a finger on;
The Doctor opening the door;
The Master only realising which door the Doctor has opened when it's too late;
The Master running after the Doctor when they abruptly enter the room;
There's a stranger in the room that simply fascinates the Doctor and they also can't tell why;
The Master recognizing the stranger the second their eyes meet and the stranger gives the Master a sardonic smile;
The Master physically restraining the Doctor for them not to talk to the stranger;
The Doctor only realising it's their child when the decision they shall take in the room is presented;
Their child answering that the correct answer for the true or false question is that "the Master has no children" is the correct one;
They getting it wrong and getting pissed because the Master had declared them bastard a long while ago;
The Master sheepishly saying the right answer is that he has two children he loves;
The Doctor being heartbroken when sudden the next door opens and Susan, their second child, is inside frozen on a stasis frame on her last moments.