The Daleks are returning to Doctor Who for the show's 50th anniversary special, starring Matt Smith, David Tennant and John Hurt as the Doctor.
The show will be broadcast on 23 November, exactly 50 years after its first outing in 1963.
Billie Piper will return as Rose Tyler, while Jenna Coleman will continue as Clara Oswald. They will be joined by Gavin and Stacey star Joanne Page.
The episode will also bring back the villainous Zygons.
They last appeared in the show in 1975 with Tom Baker.
The programme's lead writer and executive producer Steven Moffat said: "The Doctor once said that you can judge a man by the quality of his enemies, so it's fitting that for this very special episode, he should be facing the greatest enemies of all."
The show was filmed earlier this year in Cardiff, with further footage shot in London at notable locations including the Tower of London and Trafalgar Square, where Smith was photographed dangling from the Tardis near Nelson's Column.
Speculation is still ongoing as to who will replace Smith as the next Doctor, after he announced in June that he was leaving the role.
Doctor Who was first broadcast on 23 November 1963 with a four-part adventure known as An Unearthly Child.
The show was originally commissioned by the BBC's head of drama Sydney Newman, and produced by Verity Lambert.
Saying the Daleks are going to be in the 50th Anniversary episode of Doctor Who is about as much of a spoiler saying Star Wars will have music from John Williams in it.
Find something more important to "hate".
As I haven't watched all the original episodes, I don't know what a Zygon is... at least I don't think I do.
It's 106 miles to Chicago, we got a full tank of gas, half a pack of cigarettes, it's dark... and we're wearing sunglasses.
Hit it. Blank Yellow (NSFW)
Havok wrote:Saying the Daleks are going to be in the 50th Anniversary episode of Doctor Who is about as much of a spoiler saying Star Wars will have music from John Williams in it.
Find something more important to "hate".
As I haven't watched all the original episodes, I don't know what a Zygon is... at least I don't think I do.
Well they look sort of like giant aquatic foetuses, but as their shape changers they mostly look like normal humans.
On TV they only appeared in the Loch Ness Monster where there were living off the milk of the aforementioned monster which they had brought to earth with them. They had the standard plan of conquer the earth and Zygonform it as a new home after their old planet blew up for some reason.
They've appeared in a novel or two and a few audio adventures but not really an A lister or even B lister really.
They are cool looking. I really need to pick up a Doctor Who collection so I can watch the old stuff. Netflix has some, but not nearly enough.
It's 106 miles to Chicago, we got a full tank of gas, half a pack of cigarettes, it's dark... and we're wearing sunglasses.
Hit it. Blank Yellow (NSFW)
Just the fact that the episode's going to feature Daleks doesn't really tell us anything. The Five Doctors technically featured Daleks as well, but that fact in isolation is completely meaningless.