His name is Gregory Sierra, Goom. He quit after the third or fourth episode, and made Edward James Olmos a star. Sierra says it was the biggest mistake of his professional life.
Yeah, the two characters (Rodriguez & Castillo) were very different though. It was said that Rodriguez was the image of a higher-ranked cop you'd see in the 70's. Castillo was said to have broke that mould because of the personality that was brought by Olmos.
