Dimensions In Time is how NOT to do a multi-Doctor adventure. It has everything that could possibly go wrong with a multi-Doctor story: some of the Doctors don't get enough screentime, the narrative is confusing and almost non-existent, the acting often treads into camp territory and the companions may as well not be there.

It also inexplicably crosses over into EastEnders.

Who the hell wants to see Doctor Who in the same universe as EastEnders?

There's a reason why Tony Stark doesn't pop into The Woolpack or Bruce Wayne doesn't eat a Betty's hotpot in the Rover's. And that reason is because it would look ridiculous.

If there's one good thing about Dimensions In Time, it's that it only lasts fifteen minutes.