We were all so scared about what was going to happen in The Giggle, how the Doctor was going to suffer or if Donna was going to die, that we didn't even stop to think about the most groundbreaking plot twist: a happy ending.
I’ve been hiding in that song for decades. And now I’m going to burst out of it. Hold tight! No. But. Sorry. Have you got the rights to that song? I created that song.
Doctor Who: The Giggle (Target Collection) by James Goss
No, no, no, no, no. I think you'll find that I'm in charge here. And we've been infiltrated by an alien, by a man with two hearts, a man who changes his face and cannot be trusted.