Day 27 - A story you wish hadn’t been made
There are simply too many to mention. And it's too depressing to think about. So I'll just skip straight to the next question:
Day 28 - An episode idea you created yourself
This will undoubtedly get made, but I'm claiming copyright, Grouse 2010:
The Chronophage of Cambridge is actually a trapped Chronovore. The Master arrives, goes "'sup, bitch?" and sets it free and all hell breaks loose. And there will be epic chaos and lols and profound moments and tears and the gay shall be overflowing. With red grass flashbacks.
I'm willing to bet money that they'll end up using the Chronophage *somehow*. Just gimme my royalties, guys.