Edward James "Eddie" Olmos (born February 24, 1947) is an actor and director. His most memorable roles are as Gaff in Blade Runner (with Brion James), Lt. Martin Castillo in Miami Vice, Jaime Escalante in Stand and Deliver (with Lou Diamond Phillips and Rosana DeSoto), the head of the Quintanilla family in the film Selena, and as Commander William Adama in the re-imagined Battlestar Galactica series.