Actor, director and producer Peter Horton was probably best known by viewing audiences for his portrayal of single, carefree Gary on the iconic eighties yuppie drama, "thirtysomething" (ABC, 1987-1991). The lanky, bearded blonde with the charming smile had a sizeable list of TV and film acting credits - however industry followers and credit-readers knew that the bulk of his work was actually behind the camera. As director, producer, and creative consultant for award-winning dramas like "The Shield" (FX, 2002-08) and "Grey's Anatomy" (ABC, 2005- ), Horton proved he was more than just a camera-ready pretty boy. Horton was also an outspoken environmentalist, serving on the board of the Environmental Media Association and appearing in Chris Paine's documentary "Who Killed the Electric Car" (2006).