Watch The Simpsons S21E17: American History X-cellent The new episode of The Simpsons is the animated shows 17th episode of the 21st season that aired last 04/11/2010 Sunday at 8:00 PM on FOX. Watch The Simpsons 21×17 Free Online Streaming Full Episodes Replay of the Latest Season and Video Clip Download Link:
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Watch The Simpsons Season 21 Episode 17 – American History X-cellent
