'Doctor Who' New Episodes Descriptions And Posters (PHOTOS)

"Doctor Who" returns with new episodes on Saturday, March 30 and BBC America has a whole batch of new posters for the adventures of the Doctor and his new companion.

The first episode back since the 2012 Christmas special is called "The Bells of Saint John" and was written by Steven Moffat, the showrunner, executive producer and lead writer of "Doctor Who."

Here's how BBC America describes it:

The Doctor’s search for Clara Oswald brings him to modern day London, where Wi-Fi is everywhere. Humanity lives in a Wi-Fi soup. But something dangerous is lurking in the signals, picking off minds and imprisoning them. As Clara becomes the target of this insidious menace, the Doctor races to save her and the world from an ancient enemy.

Click through the slideshow below to see more posters, photos and read the official episode descriptions.

"Doctor Who" returns with new episodes on Saturday, March 30 at 8 p.m. ET on BBC America.

"Doctor Who" Season 7