When did The Simpsons Season 20 Episode 13 air?
The Simpsons Season 20 Episode 13 aired on March 15, 2009 at 8 PM ET.


Just a product of society that's lost its good manners.
Set in Springfield, the average American town, the show focuses on the antics and everyday adventures of the Simpson family; Homer, Marge, Bart, Lisa and Maggie, as well as a virtual cast of thousands. Since the beginning, the series has been a pop culture icon, attracting hundreds of celebrities to guest star. The show has also made name for itself in its fearless satirical take on politics, media and American life in general.

Lisa infiltrates a convent in order to steal back Maggie who was accidentally taken in by nuns. While in the convent, Lisa uncovers a series of cryptic clues leading to a hidden jewel in Springfield. With help from resident history buffs Principal Skinner and Comic Book Guy, Lisa sets off to find the coveted prize. But Springfield's Freemasons are also hot on the trail of the jewel, and Lisa must race against them to find the jewel and rescue Maggie.
Direct answers for episode-level questions and details.
The Simpsons Season 20 Episode 13 aired on March 15, 2009 at 8 PM ET.
This episode runs for approximately 23 minutes.
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