Doctor Who 50th Anniversary Special 2013 [VIDEO]: BBC Composer Murray Gold Hints at 'Controversial' Episode with Matt Smith & David Tennant

Longtime "Doctor Who" composer, Murray Gold, recently opened up about this year's 50^th anniversary special, which airs November 23, 2013. The accomplished composer, who is responsible for the tension-building music on the hit BBC show, might have also dropped a spoiler in regards to the special. Though Gold did not reveal too much about the special's plot, he did hint that it could easily stir up some controversy.

"There's some really interesting things to say about [the 50th anniversary special] but I can't say them," he said. "It's very, very well directed. There's a thing they've done in it, which might be controversial... It's interesting though."

What do you think the composer means by "controversial"?

Showrunner Steven Moffat has been tight-tipped as well in regards to the special, but recently revealed that it will be over an hour long.

"I think you could call it movie-length, yeah," he said. "I mean, I'm saying that with a slight hint of vagueness because I don't know the finished running time. It's certainly well over an hour."

Moffat also recently spoke about the chemistry between actors David Tennant and Matt Smith

"They're quite a fun pairing, I would say," he said. "There's a bit of the normal joshing of each other but they're both such enthusiastic Doctors. While they might be sort of competing slightly, they're both standing there saying, 'Oh god, it's so cool, there's two of me!' So, it's very different. I think the other one that worked brilliantly was Jon Pertwee and Patrick Troughton. They were incredibly funny together. This is very different from that but it's a sublime double act."

"They really loved each other and had a huge laugh together," Moffat added. "And of course they've been through this experience that only the two of them can talk about, really, in the modern world. They are the two people that have played that part at a time when the series is this big. They spent the entire time just sitting together talking animatedly."