Molinaro joined the cast in Season 4 after Pat Morita, who played Arnold, left after the end of the third season (in the last episode "Arnold Gets Married"). Subsequently, Molinaro also played Al's twin brother priest Father Anthony Delvecchio.
Molinaro joined the cast of the show after Pat Morita left in the third season finale, and he also portrayed Al's twin brother, Father Anthony Delvecchio.