Continuing through the Troughton era, it's been interesting to see the different types of animated replacements produced. The one I'm currently on, Fury from the Deep, is the first I've seen where
all of the episodes are animated. This seems to have given them a freer hand, since they're not trying to match appearances with other episodes. So it's widescreen, color, and the "sets" seem larger and more detailed than I expect the original had. But also, they seem to have taken this opportunity to (I'm presuming) add some more diversity to the future by "recasting" some of the non-speaking extra roles.