Edward James Olmos (born Edward Olmos; February 24, 1947) is an American actor and director. Among his most memorable roles are William Adama in the re-imagined Battlestar Galactica, Lieutenant Martin "Marty" Castillo in Miami Vice, teacher Jaime Escalante in Stand and Deliver, patriarch Abraham Quintanilla, Jr. in the film Selena, Detective Gaff in Blade Runner, and narrator El Pachuco in both the stage and film versions of Zoot Suit. In 1988, Olmos was nominated for an Academy Award for Best Actor in a Leading Role for the film Stand and Deliver.