BBC, Ask Tom Baker Nicely
Tom Baker could be persuaded to make an appearance in the fourth series of Doctor Who. He told Kent News:
"Perhaps I might make a guest appearance - perhaps. Providing they ask me nicely, of course."
Baker is my favorite of all the doctors so far. His style, delivery, and approach really captured the essence of the ideal time lord. So BBC ask nicely so that we can see him return. You are bringing back Davros and the Daleks so why not Tom Baker.
For those of you who have not seen, here are the two classic episodes on the Daleks.
Genesis of the Daleks Destiny of the Daleks