Complex sentence: The rabbi later became an infrequently recurring character, and his ocassional brief speaking parts were voiced by Dan Castellaneta, although Mason would later return to voice the character in "Today I Am a Clown" in the fifteenth season.
Split into simpler sentences: The rabbi later became an infrequently recurring character, and his occasional, brief speaking parts were voiced by Dan Castellaneta. Mason later returned to voice the character in "Today I Am a Clown" in the fifteenth season.