With Christmas soon upon us, details about the Doctor Who Christmas special have been released along with a sneak peek at another upcoming episode.

According to Huffington Post, the Doctor will encounter Silurian Madame Vastra and her cohort Jenny. The special will be Jenna-Louise Coleman's official debut as the Doctor's new companion, Clara Oswin, who appeared previously in the season seven premiere.

"We meet the new companion. And we’ve got Vastra, Jenny and Strax are making a return appearance which is terribly exciting. And it does the sort of wonderful Doctor Who-ey Christmas things, you know, snow, aliens, good will, good cheer, someone trying to take over the world. Hopefully it makes for good Christmas day telly," Matt Smith, the eleventh Timelord, told Collider.

It was also revealed that when Doctor Who's seventh season continues in 2013 it will feature an episode written by Neil Gaiman, who previously wrote the show's episode called "The Doctor's Wife." The episode will include the legendary Cybermen as well as guest stars Warwick Davis, Tamzin Outhwaite and Jason Watkins, reports The Huffington Post.

"Cybermen were always the monsters that scared me the most! Not just because they were an awesome military force, but because sometimes they could be sleek and silver and right behind you without you even knowing," executive producer Steven Moffat said to BBC.

"And with one of the all-time classic monsters returning, and a script from one of our finest novelists, it's no surprise we have attracted such stellar names as Tamzin, Jason and Warwick," Moffat continued.

The Doctor Who Christmas special airs on December 25 at 9 p.m. ET on BBC and season seven will continue in the spring of 2013 with eight episodes.