The Doctor perked up and pushed the monitor back into it's little cubby hole. He turned on his heel and looked at Charles, smiling brightly. "A tour? Of course!" he grinned. "That was the plan! Well, I'd already been preparing for one anyway" he added. "Wasn't too sure if you were just a man of actions or really a man of learning" he said, peering at him closely. And by that he meant that either Charles would be as hurried as the others in just trying to get to work, or the type of man who wanted to see things before acting.
"Come along them, Charles. Plenty to see... we can come back here, later, this is just the main control room that generally flies the TARDIS" he explained as he walked down the stairs and away from the central column. "Now... where first..." he said, tapping his lip thoughtfully. "Tell me what sort of thing you'd like to see, anything you can imagine" he said with a sparkle in his wise old eyes.