Yeah, "Hell Bent" is pretty much saying that Ten didn't deserve to make that choice for Donna.

The same reason that sometimes the Sonic Screwdriver is a one-of-a-kind device that can't be replaced, and sometimes it's destroyed and brought back without explanation.

I'm assuming Obama announcing he would solve the recession only to go on stage and from the world's point-of-view have no idea what he was going to say for no reason pretty quickly made Biden or Romney President and we're seeing that President.

And another one the British Premier League out of nowhere.

Maybe after the episode the aliens sold the simulation to some screenwriter, who now runs a The Orange President show.

You can, at any point, split the cast up to remove one character whilst still retaining a double act elsewhere. It's great.

And in The Eleventh Hour

And they spent a lot of last season dancing around denying or confirming the half-human moment, so there's that.

Which character are you talking about?

Is Rupert Murdoch the Master in the Vault?

Yeah, they should be investigating. That I might look past because UNIT probably got tipped off that it was alien.

That's been a big issue for this Series of DOCTOR WHO. Oh, a weird puddle turned a university student into a monster, problem solved without figuring out what actually happened; oh, a whole bunch of colonists are now living in a city run by their former servants, better run away and hope for the best; oh, a monster in…

Along with about 20% of the Robert Holmes/Tom Baker era.