About Peter Horton
Peter Horton is an American actor and director. He played Professor Gary Shepherd on the television series Thirtysomething from 1987 until 1991. Horton co-created the 2015 series American Odyssey. As a producer, he produced Reconstruction (which he co-created), Lone Star, The Philanthropist, The Body Politic (which he also co-created), Grey's Anatomy, Six Degrees and Murder Live (for which he wrote the story).
Biography source: Wikipedia. The profile adds birthday-specific historical context from the Celebs Birthday Today editorial database.