As Chuck, O'Herlihy played the basketball jock / older brother of Richie and Joanie (Erin Moran). O'Herlihy is a few months younger than Howard, even though he was cast as his older brother. O'Herlihy's character had few speaking parts and by the middle of the first season – which aired in 1974 – Chuck was written out of the script by going off to college. He never returned.