Everything is different, now that I see you 

Song: I See The Light (From “Disney’s Tangled”) by Mandy Moore, Zachary Levi

There should totally be a spinoff series where Twelve goes back in time to Pompeii. His companions could be Evelina and Quintus. Plus, it would explain why Peter Capaldi’s in Pompeii with Ten. And it would explain why bought the TARDIS because he wanted to make sure that his past self would go to him, see his ‘daughter’/companion, and then find out about the Pyrovile, etc.