To keep Doctor Who fans occupied between seasons, BBC America is replaying, over the next stretch of Saturday nights, the entirety of Season 9, with Peter Capaldi and Jenna Coleman as the Doctor and his traveling companion Clara. What makes these more than mere repeats is the addition of what BBC America is calling “Doctor’s Notes” superimposed on the episodes, pointing out various details and “in jokes” you might have missed the first time around. Like in tonight’s episode, where one “Doctor’s Note” reads: “Notice the ship’s crew in the mural: they’re dressed like Starfleet crewmembers from Star Trek.” Sold.