[Memory TARDIS]

(Not much of a mash-up this time as this is just an explanatary filler between the two part series one finale. There is a miniature jukebox. The Fifteenth Doctor and Ruby Sunday are sitting staring into a small version of the new Time rotor as if it is a campfire. The air of doom and gloom is palpable.)

DOCTOR: I fought Sutekh. A long time ago in the summer of 1911, deep in the English countryside.
RUBY: But you beat him. You won.
DOCTOR: By the skin of my teeth. I don't think I could do that again.
RUBY: So what happened?
DOCTOR: I was a different man back then. I don't think you would have recognised me. I travelled with this amazing friend, like you. Her name was Sarah Jane Smith and we had some good times. But... no. No, the story doesn't start in Britain. It starts halfway across the world... in Egypt, where an Englishman was looting the tombs of the Pharaohs and disturbing the dead.

Pyramids of Mars

RUBY: But Sutekh survived.
DOCTOR: All this time I thought he was dead, but he was just waiting.
RUBY: You fought him. You defeated him. You've got to know something we can use against him.
DOCTOR: That Sutekh was the size of a man. He's now evolved into a Titan. How do I fight that?
RUBY: And if you don't?
DOCTOR: It's the end of the universe. What do I do?