I believe they foretold the Tom Baker to Davidson regeneration. Baker was shadowed by the man in black for a couple of episodes prior to his regeneration. It wasn't as prolonged as the Tennant one and he didn't get a 15 minute homage but it was foretold.

I thought that it was a wonderful episode but at the end when the Doctor cries, "I don't want to leave (?)", all that I could think (through my tears) was that David WANTED to leave the role!

*Cribbins, not Crimmins ;-)
He actually played a part in one of the old Who movies (With Peter Cushing I Believe) - I think it would have been cool to have refered back to that, but regardless I thought he was the best thing to happen in the last Series & specials (except for DT himself)

Watched Dr Who since the mid 60s (from the beginning) and David Tennant has been an excellent doctor. He'll be missed but I sure won't miss Russell T Davies. His tended to be the episodes I liked the least.

I've never watch any of the other Dr's just this one and I can't imagine any one else doing the job so well.

I will miss David Tennant in this role !

My 1st ever Doctor Who episode was School Reuinon with David Tennant mainly because I saw Anothny Head and I was more into Buffy then anything else at the time. When I saw it one BBCAmerica after Scifi I notice Christopher Eccleston. I watched him and fell in love with him then when David came along I wasn't sure about him at the time. But now he's my favorite Doctor and I don't want to see anyone else play the role. I cried for a 1/2 hr striaght after his episode ended. David as the 10th Doctor will be greatly missed!!!! I'm still gonna watch to see how Matt Smith does, I don't wanna completely forget about the show.

I too was taken with this transformation. Others I've seen were pretty dry & matter of fact. Just a bit of business.
Moving on. But this one had life and depth. A real guy hanging it all out.
Guessing this isn't done all that often because it can really leave a big hole for next actor. A no nonsense break just
gives next guy a fresh start. Tennant was so central to this Doctor that it was worth it to play up his personality. Anything less would have been too deep a hole afterward. This episode tied it all up for me.
Now we see what new material they'll drum up. So far it's been great.

I cried buckets, which was really unexpected. David Tennant was really brilliant as the Doctor and his conversations with Wilf were so wonderfully emotional. I will miss his rendition of the Doctor very, very much.

So hard to watch...this is the first time I've not been ready for regeneration...even Eccleston to Tennant wasn't as...painful? Memorable? Meaningful?

I cried and cried. I would not watch the change. I've been a fan of the good Doctor since the sixties. Other than Tom Baker, I've never cared about a Doctor as much as this one. I'm just not ready for a new one. Mr. Davies is a genius. I never liked Moffatt's episodes. I'm swearing off for awhile.