10 Doctor Who Moments You Didn't See Coming

Most Doctor Who stories are self-contained, and one thing that's almost guaranteed is that the plot will be neatly wrapped up by the time the credits roll.

So when the Doctor goes blind after saving Bill in the middle of Series 10's Oxygen, you're never really thinking this will be a long-term problem for him to deal with. And why would you? Of course the Doctor's going to fix this. That's just what he does.

But then... psych!

At the very end of the episode, the Doctor tells Nardole that he can't look at anything, ever again. The screen then slams to black, and he utters the phrase "I'm still blind", with Peter Capaldi's chilling delivery sending a real shiver down our spines.

It might be the biggest nerf the Doctor has ever received, and though the next few episodes are divisive, few people will forget how well-executed this initial twist was.