The Doctor listened with interest and without interruption.
"Key? I don't need a key. I have the TARDIS."
The Doctor pointed to a small blue box that appeared to be constructed of wood. It was smaller than most shacks, really.
"Well, come on. Might as well test a theory or two while we're here."
This time the Doctor did lead Leto towards the machine, which on the outside did not look out of the ordinary at all due to its chameleon circuit. He broke contact about a foot or so away. Despite the fact that there was a sign on the door by the handle clearly said pull to open The Doctor pushed.
The inside of the TARDIS was another matter entirely.