Harrison Ford is Indiana Jones, but will he always be? We discuss the interesting problem of replacing the face of your franchise, whether it’s Doctor Who or James Bond or Captain Kirk or Batman or Superman. Fortunately, we leave plenty of time for digressions into old TV shows (including “Three’s Company,” “Bewitched,” and “Magnum P.I.”) and anger the internet’s foremost Robocopians. Spoiler: In the end, Hollywood ruins everything.