At last, we will finally know who River Song is and what she means to the Doctor. Airing next weekend on Doctor Who (BBCAmerica is one week behind the UK now because of Memorial Day weekend), the Doctor is on a quest to save Amy Pond in the mid-season finale, “A Good Man Goes To War,” and in the process, the true identity of River Song (Alex Kingston) will be revealed. Check out these behind the scenes looks.

Doctor Who: Behind the Scenes of “A Good Man Goes to War”

Watch Doctor Who on Saturdays at 9/8C on BBC America and BBC One at 6pm.

(Tonight’s episode is “The Almost People” in the states.)