The original pilot episode was rediscovered in 1978 in a mislabeled film can. After an archive purge by the BBC between 1972 and 1978, the film survived by chance and was originally thought lost forever.
When the script called for him to recite coordinates to program the TARDIS, Tom Baker would sometimes rattle off a string of digits that was actually the telephone number to the "Doctor Who" production office; no one ever caught on.
Asteroid 3325, a small main belt asteroid discovered in 1984, is named "TARDIS" after the Doctor's time/space machine.
Jon Pertwee was fond of using the phrase "reverse the polarity" in his dialog, so the writers made sure his incarnation of The Doctor said it frequently. The most common use was the technobabble sentence "Reverse the polarity of the neutron flow", which, due to its popularity with fans, was also used occasionally by later Doctors.
The BBC owns the copyright to the design of the Police Box as used as the design for the TARDIS. It was bought from the Metropolitan Police.