I don't even know what I'm doing.

The Doctor stands in the middles of the blank white room, 3D glasses crooked on his nose.

"That man," he's muttering over and over - "That man, he drives me crazy! Insane! That man drives me mad!"

"He's lost it," Rose says sorrowfully. "He's off his rocker."

"I'm sure he -" Jackie begins, but Rose's fears are confirmed as the Doctor throws his head back and yells into space, pain in his voice -

"Daleks and Cybermen? This is a series finale, isn't it, Russell?"