EXCLUSIVE: Peter Gallagher ( The O.C. ) is set to join Andie MacDowell in The Right Side , the independently produced comedy series from Max Talisman and Lynne Kamm, currently gearing up for production in New York. The project puts Gallagher and MacDowell on screen together for the first time in many years. They first starred together in Steven Soderbergh’s Sex, Lies & Videotape nearly four decades ago, before going on to share the screen in the Robert Altman films The Player and Short Cuts . As we reported in January, The Right Side is a story about politics as content, family as collateral damage, and the impossible task of loving people you fundamentally disagree with. Dyllón Burnside and Talisman are also set to star. The story begins with a live, on-air announcement that turns a terminal illness into a national spectacle.…