"Sierra's first major role was in "Sanford and Son," beginning in 1972. He played Julio Fuentes, the Sanfords' Puerto Rican neighbor. While he was appearing on "Sanford and Son," he made a notable guest appearance on "All in the Family," playing a Jewish radical working to stop antisemitism in the Bunker's neighborhood. In 1975, Sierra was cast as Detective Sergeant Chano Amengual in "Barney Miller," whose memorable storylines included his anguish over having to kill two bank robbers in the line of duty..."