'The Last of Us' finale: Why Ashley Johnson's cameo is so perfect

Week after week, The Last of Us has featured performances from the video game's original actors. Merle Dandrige reprised her role as Firefly leader Marlene. Jeffrey Pierce, who played Tommy in the games, showed up in Kansas City as Kathleen's (Melanie Lynskey) henchman Perry. And in episode 8, original Joel actor Troy Baker took...