Last month, the BBC confirmed that the second half of Doctor Who Season 7 will debut on Saturday, March 30th. The network has unveiled a new poster for the Doctor Who mid-season premiere, entitled "The Bells of St. John", along with more details about the episode and the remaining episodes. Take a look at the poster, featuring Matt Smith as the Time Lord and Jenna-Louise Coleman as his new companion Clara, then read on for all the official details.

"The Bells of St. John" is written by lead writer and executive producer Steven Moffat (Sherlock). Set in London against the backdrop of new and old iconic landmarks - The Shard and Westminster Bridge - The Bells of St. John introduces a new nemesis, the Spoonheads, who battle the Doctor as he discovers something sinister is lurking in the Wi-Fi.

The premiere will be followed by seven new episodes written by Steven Moffat, acclaimed writer Neil Gaiman (Coraline, Beowulf), Mark Gatiss (Sherlock), Neil Cross (Luther) and Steve Thompson (Sherlock).

The Doctor (Matt Smith) is joined by his new companion Clara (Jenna-Louise Coleman) for the latest set of incredible adventures through space and time. The duo finds new adversaries and familiar friends around every corner as they journey from the bottom of the ocean in a submarine to the center of the TARDIS and beyond. The Cybermen make a thunderous return and the Ice Warrior arrives in an unexpected place. Here's what Steven Moffat had to say about the new episodes.

"It's the 50th year of Doctor Who and look what's going on! We're up in the sky and under the sea! We're running round the rings of an alien world and then a haunted house. There's new Cybermen, new Ice Warriors and a never before attempted journey to the centre of the TARDIS. And in the finale, the Doctor's greatest secret will at last be revealed! If this wasn't already our most exciting year it would be anyway!"

Also appearing this season are guest stars Dougray Scott (Desperate Housewives, Mission: Impossible 2), Warwick Davis (Life's Too Short, Harry Potter), Celia Imrie (The Best Exotic Marigold Hotel), Richard E. Grant (The Iron Lady, Dracula), Jessica Raine (Call the Midwife) and Tamzin Outhwaite (EastEnders). Additionally, mother and daughter Dame Diana Rigg (Game of Thrones, On Her Majesty's Secret Service) and Rachael Stirling (Tipping the Velvet) will appear on screen together for the first time.