FOX | 8:00 pm
Matt Groening's unstoppable animated comedy series blows past yet another milestone — its 700th episode — with "Manger Things," a new half-hour that, among other things, reveals a secret from Ned Flanders' (voice of Harry Shearer) past. Fans also are promised a new couch gag from veteran animator Bill Plympton in the opening credits, as well as a peek inside a never-before-seen room in the Simpson household. Dan Castellaneta, Julie Kavner, Nancy Cartwright and Yeardley Smith head the voice cast. Fox recently picked up this series for two more seasons.