The BBC said Saturday that Davies is set to end his run as the series' producer and Tennant is being replaced as the show's beloved Time Lord character following the final two "Who" episodes.
"I'm very proud of these two episodes," Davies said. "Now I simply feel happy to be honest, really happy with what we made."
"We've got one or two surprises in store before the episode on New Year's Day -- and it might not be quite what you expect."
Actor Matt Smith will take over the "Who" lead role from Tennant, while Steven Moffat will assume producer duties from Davies.
Davies, who helped "Who" return to television in 2005, told the BBC he remains in contact with Moffat regarding the everyday production of the popular science fiction series.
"He does find time to e-mail me every so often saying it's all a nightmare, and he's never been happier in his life," Davies said.
"I've read some of the scripts -- they are beyond brilliant -- I can't tell you what thrills and darkness and comedy you've got to come."
|Additional TV Stories|
LOS ANGELES, May 24 (UPI) --Joe Francis says he is sorry he told The Hollywood Reporter the jury that convicted him of false imprisonment is retarded and should be euthanized.
MOUNT VERNON, Wash., May 23 (UPI) --The Skagit River Bridge in Skagit County, Wash., collapsed Thursday, sending the north and southbound lanes of Interstate 5 into the water, police said.
MANILA, May 24 (UPI) --The Philippines is determined to spend $1.8 billion on military upgrades -- mostly naval -- to protect the country against "bullies" in its territorial waters.