@bluesqueakpip thank you so much for putting my post in the correct topic. It somehow seems impossible that everyone he knows and/or cares about is gone. And that he didn’t manage to save at least one person. That’s not the Doctor we know and love.
I don’t know if Clara’s related to Susan, I guess we will find out eventually what’s the real deal with Clara, but I am certain that somewhere out there, even if it’s on the trapped Gallifrey, there is someone Doctor cares about. And hopefully, maybe even his children.