"All right," said Martha, reluctantly. He sounded exhausted, which meant that he needed her attention - her help - whether he wanted it or not. She wasn't going to leave him. "But I'm coming into the bathroom with you."

As she moved to open the bathroom door for him, she heard a very familiar voice coming up the stairs. Usually, she was happy to hear Jenny. But not today and not now. She didn't want to have to lie to her. She wasn't sure she could.

"Jenny?" she called back, then: "Doctor, it's Jenny. She knows we're here. I've got to let her in."