Tonight, Fox airs the 100th episode of Glee (boy, these kids sure have been through a lot), and the main reason we care? Brittany S. Pierce (Heather Morris) returns! New Directions' comedy and dancing superstar left at the end of season four after gaining early admission to MIT (and because in real life, Morris was expecting). To mark the occasion, there will be singing, dancing, and another episode of "Fondue for Two." No, we don't see Lord Tubbington in this clip, either, but we're sure he'll turn up, because otherwise, MAJOR OVERSIGHT!