10 Doctor Who Episodes More Important Than You Realised
8. Dimensions In Time
Sure, there are doubts over whether 1993's charity sketch Dimensions in Time is canon, but what else was the Seventh Doctor referring to when he mentioned the Rani in Tales of the TARDIS?
But aside from now being canonically the beginning of Ace's final regular adventure, Dimensions in Time represents a notable technological first for Doctor Who.
That's because it was the first Doctor Who story to be shot in 3D. It's worth pointing out that this was part of a wider gimmick deployed by Children in Need in 1993, but Doctor Who was the show that best fit the format.
On the original broadcast, a little icon would pop-up in the corner of the screen instructing viewers to put on the 3D glasses they got from the front of the Radio Times, so that they could be dazzled by the nightmarish floating heads of William Hartnell and Patrick Troughton.
It's obviously far more primitive than the technology used to realize The Day of the Doctor's eye-popping 3D sequences, but that doesn't stop it from being the first Doctor Who story to use it.
So that's 3D for the 30th anniversary and the 50th anniversary... a 4DX screening for the 70th anniversary, anyone?