Ask a question in the box below, or search using the box above.

As you enter your question, our massive, TARDIS-sized computers will search out other similar questions. So be sure to check the list that pops up before asking your question. Once you've decided that your question has not been asked before, push the not-so-threatening blue button below.

If you want to ask questions needing speculation or people's opinions, please do it in our Watercooler forum, not here. The main Q&A space is for questions with definitive factual answers. Thanks!

To avoid spoilers in the main Q&A section, please do to not post information about stories that have not been released in the UK, or ask for information about stories that have not yet aired there.

Presumably any companion with a superphone, plus anyone involved in the "Children of Time" group in "The Stolen Earth" who used the number to contact the Doctor, and according to "The Day of the Doctor" it's known by people in UNIT ranging from Kate Stewart (who somehow got hold of a sound recording of the TARDIS dematerializing to use as her ringtone) to an underling. Winston Churchill also had the number & used it to call the Doctor at the end of "The Beast Below".

As the universe of the doctor who is bigger than a life time and expanding, it is nearly humanly impossible for one to know all the people from the Doctor Who franchise that knows his number but here are a few: