What else is inside the TARDIS?

The first person to stumble upon the Tardis was that lone beat Bobby at the opening of 'An Unearthly Child' (Pilot & Televised versions). We never saw him again.

It has often struck me as plausible that he is still wandering through the labyrinth of the Tardis corridors and any day now will stumble back into the console room like that Monty Python character ("Its...").

Or perhaps time is compressed for him and he has merely been at home with the swimming pool and those food machines that made mars bar sized bacon and egg breakfast snacks, making sand castles with his helmet and one left by that Sontaran he once met. A standard one for the BF Short Trips range perhaps?