On Doctor Who Season 7 Episode 15, which was also the Doctor Who 50th Anniversary, there were three Doctors, one companion and a companion-ish, PLUS every other Doctor (at least in appearance) to help save the "Day of The Doctor."
When The Eleventh Doctor is summoned by Elizabeth I via a painting and a letter, he comes face to face with The Tenth Doctor and then The Warrior Doctor as all three are needed to solve their biggest mistake. The day they chose to destroy Gallifrey.
Will three (or five) heads be better than one? Perhaps Eleven or Thirteen heads might make the going a bit easier? On The Day of the Doctor, something quite extraordinary happens, and The Doctor (it doesn't really matter which) learns he is never quite alone in this universe.
On November 23, 2013, people all over the world sat together at the same time, whether in the US, the UK or anywhere else - and whether they were at home or in a movie theater - they all watched the same installment of Doctor Who at the same time, just as all of The Doctors worked together to solve the greatest problem ever to come their way.
Now it's your turn. Rest assured that when you click below, someone, somewhere else on this planet is likely doing the same, beause in the Whoniverse, you are never alone.
Watch Doctor Who online now.
Carissa Pavlica is the managing editor and a staff writer for TV Fanatic. Follow her on Twitter.