What If... Doctor Strange Lost His Heart Instead of His Hands?

 "Stephen, this path only leads to darkness and the end of this reality."

This episode is very good: a timey-wimey tale of another universe's Doctor Strange, one who lost not his hands in the crash, but his beloved Christine, and whose obsession to bring back his love eventually destroys the universe in exactly the sort of hubristic act we know Strange is pretty much capable of- that's the tension that makes the character so bloody good.

There's so much to enjoy here. Strange's desperate Groundhog Day moment as he attempts to save Christine again and again, only for every conceivable alternative to result in her death. The revelation that the Ancient One has split Strange into two. Strange's horrified realisation of what he has done. And, for the first time, an interaction with the inscrutable Watcher as he begs for help only to be told the Watcher, as ever, "cannot interfere".

Well, except when he can. I bet we will ultimately see that happen.

Overall this is an excellent bit of telly, full of heart and imagination. It is, perhaps, just a little too reminiscent of Steven Moffat's writing, particularly on Doctor Who, not to have been quite clearly influenced, but nevertheless I very much enjoyed this.