"Not yet," the Doctor said. "Still dark out there. If you're going to be walking about without any trousers, you'll really need to know what you're stepping in."

He gripped back on Jack's hand and offered him a smile. Back in one piece was good. It was very good. Course, the Doctor shouldn't have worried. He wasn't sure why he'd even thought about worrying. Idiotic things, worries.

"Besides," he said, clearing his throat as he looked behind Jack to the mouth of the cave. "I think I can see one of the suns now. Must not be a very large world to have such a short night but still keep generally Earth-equivalent gravity. Or maybe it's just a very large sun, in which case we'll need to be out of its rays by midday. Maybe one of the non-biting-people-in-half locals will be able to give us some clues on what we should look out for."