Cool.
Off-topic and I'm not going to post a thread about it, as it's probably lies, but apparently the Daily Express is reporting that Tom Baker is to return for the 50th anniversary of the show.
Well, now let's not be hasty, perhaps it's not true
yet that he's confirmed, but, there's every reason to believe there's a good chance it could happen.
All they need to do for Tom Baker (Or Colin Baker), is give him a respectable length grey wig with the same curly hair style (though obviously shorter, and not all big and bouncy), and a similar costume and he'll easily be recognizable. IMHO, it doesn't matter that he's aged, as long as he's recognizable.
NOTE: I DO NOT propose they make him (Or Colin Baker) up to look ridiculous or try to make them look 35 or 40 again. The other three, I think are recognizable enough if they only wear their similar costumes.