A short note on Dimensions in Time and canonicity.

TV Gen of Deek has an exhaustive blog post about the joint history of Doctor Who and Eastenders. Everything is going swimmingly with an exhaustive description of Dimensions in Time before it has this to say about it:

"Don’t worry kids though, it’s not canonical."

If you say so. I've never thought it wasn't. As the TARDIS Datacore explains, There's a reference to it in the Virgin New Adventure First Frontier which suggests the Doctor was well aware he was walking around in a soap opera. If you accept that the Eastender therein was some kind of Auton simulacrum (explaining Pauline) or some such, it's perfectly fine.  Even if you don't, it could be the usual time differential business which leads Doctors to forget some moments when they have met up (ala The Day of the Doctor).  Either way, it may be rubbish, but it still counts.

But then, of course, in Doctor Who there is no such thing as ‘canon’. Unless there is.