Specifically, they've done an animation patch up of "The Power of the Daleks" - which happens to be Troughton's first outing as the Doctor, and the test of the experiment of regeneration - a concept that was not in the original plan for the show. (In fact, the Doctor was originally written as a highly eccentric mad scientist from the future).
It will air on BBC America on Saturday, November 12 - I don't have a time yet.
I have not seen this one at all, so looking forward to it, even in a rather awkward form.
Give it a few years and it may well be possible to use the same techniques now being used to re-animate dead actors from stock footage to restore every lost episode that has a surviving sound track and script to something resembling the original...imagine that.