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David Semel is an American film and television director and producer. His television directing credits include Studio 60 on the Sunset Strip, Person of Interest, Ally McBeal, Boston Public, 7th Heaven, No Ordinary Family, American Horror Story, Roswell, Angel, Buffy the Vampire Slayer, Watchmen and other series. He also directed and produced episodes of Life, House, American Dreams, Beverly Hills, 90210 and Dawson's Creek. Wikipedia