The wait for Peter Capaldi's first full episode seemed to take forever, but it was well worth it. As a standalone release, the reason to buy this is for the extras. The episode was screened in theatres worldwide and featured an exclusive introductory sequence featuring the Paternoster Gang and starring Strax. He reports to his Sontaran superiors on the various incarnations of the Doctor, and it is hilarious. Also included is a "Doctor Who Extra" on the making of "Deep Throat." It's a bit more glib and superficial than the old "Doctor Who Confidential" eps, but still fun to watch. We're told these extras won't feature on the Complete Season Eight box sets, so this may be your only chance to see them outside of the theatre.