Peter Gallagher is an American actor. His Hollywood career became mostly active in the 1980s. During his early years, he had roles on the shows Guiding Light, Skag, and American Playhouse. His first notable role in the movies was in Sex, Lies, and Videotape. In the 2000s, he starred in the movies Short Cuts, The Hudsucker Proxy, While You Were Sleeping, and American Beauty. During the same period, he became known for his role as Sandy Cohen on The O.C.. In the 2010, he became known for his role as Arthur Campbell on Covert Affairs, as well as role as Deputy Chief William Dodds on Law & Order: Special Victims Unit.