What aliens are hiding in new 'Doctor Who' poster?

The 11th Doctor and his latest companion, Clara Oswin Oswald, will face familiar foes and scary new enemies when Season 7 resumes later this month on BBC America. The network Thursday released details about the midseason premiere, "The Bells of St. John," as well as the clue-filled poster and trailer (watch below).

By Curt Wagner, @ShowPatrol

March 1, 2013