Complex sentence: For the 1979-80 season, the series was expanded to ninety-minutes with the addition of "The New Shmoo" episodes and retitled "Fred and Barney Meet the Shmoo".
Split into simpler sentences: For the 1979-80 season, the series was expanded to a 90-minute timeslot with the addition of "The New Shmoo" episodes. It was retitled "Fred and Barney Meet the Shmoo".