Nucky asks Margaret to toe the party line; Angela (Aleksa Palladino) witnesses Jimmy’s violent side; Capone (Stephen Graham) faces a crossroads; Van Alden (Michael Shannon) grapples with his emotions. Written by Lawrence Konner; directed by Simon Cellan Jones.What HBO refuses to tell you is the spoiler-cloaking text invisible. * The episode begins with Richard Harrow, the half-faced vet on whom much of this episode focuses. If you don’t fall in love with the character this week you will next week. * Somebody tells Al Capone he wears the hat of a boy and lives to tell about it. * Meyer Lansky’s back. So is Chalky. * Angela’s lesbian girlfriend makes a confession. * We get a lot of IRS agent Nelson Van Alden tonight. A LOT. To say this guy has layers is like saying Conan has issues with Jay. “Boardwalk Empire”: 9 p.m. Sunday. HBO. “The Walking Dead”: 10 p.m. Sunday. AMC. “Futurama”: 10 p.m. Sunday. Comedy Central. “The Venture Bros.”: 11:30 p.m. Sunday. Cartoon Network.