via BBC America:
Here's some more background on the premiere: "Doctor Who is coming to America in a spectacular two-part season premiere on BBC AMERICA. Part One premieres Saturday, April 23 at 9/8c. The mysterious time traveler, the Doctor (Matt Smith), and his companions Amy (Karen Gillan) and Rory (Arthur Darvill), find themselves on a secret summons that takes them on an adventure from the desert in Utah - right to the Ovalin1969. More details will be revealed in the coming weeks about this two-parter penned by ‘Who supremo’ Steven Moffat (Sherlock) and featuring guest star Mark Sheppard ( , Battlestar Galactica). Also set to return this season, Alex Kingston (ER, Flash Forward), as the irrepressible River Song."