t takes all the skills she's picked up on her travels, and several cannisters of Nitro-9, but Ace manages to break the Doctor out. He's battered and bleeding, but she gets him back to the TARDIS before he collapses.

"Professor?" she calls, frantic to get a response; she doesn't know much about regeneration, but she knows that he won't be the same man afterward; he won't beher Doctor anymore.

"Please wake up," she begs. "Please, don't leave me."

Finally he opens his eyes, and asks for a cup of tea, and she knows that she's saved him.

This time.