Tempus didn't answer her right away. Slowly, he tucked the screwdriver back into his pocket and turned to look over his shoulder at her.
"We have to go..." he said before looking away from her again.
His readings, they couldn't be right could they? Another TARDIS? That was impossible. He was the last of his kind... He saw his home world destroyed so many years ago, all of his people wiped out from the very fabric of the universe. No matter what he did he could never bring them back. He was cursed to walk alone for the rest of time. So the presence of another TARDIS seemed like an impossibility.
The Time Lords emotions swirled and ebbed, locked within himself, forced back. He didn't want to upset his companion, or cause her any concern if he didn't have to and until he knew what was going on, he wasn't going to do that. Things might not have been the way they seemed, surely? Or was he in denial?