The Trouble with Trillions
episode of The Simpsons (S9 E20)

"The Trouble with Trillions" is the twentieth episode in the ninth season of the American animated television series The Simpsons. It originally aired on Fox in the United States on April 5, 1998. It was written by Ian Maxtone-Graham and directed by Swinton O. Scott III. The episode sees Homer being sent by the Federal Bureau of Investigation to try to obtain a trillion dollar bill that Mr. Burns failed to deliver to Europe during the post-war era.
Plot
All of Springfield celebrates the arrival of the New Year except for Ned Flanders, who instead focuses on filing his tax returns. A few months later, as all of Springfield rushes to send out their returns just before midnight on April 15, Homer realizes he did not file his, believing he didn't need to do it every year. He rushes and provides false information before delivering it to the post office. However, at the IRS the somewhat spherical package containing Homer's tax returns bounces into a "Severe Audit" bin, and the government arrests him for tax fraud. To avoid prison, Homer agrees to help Agent Johnson of the FBI. With a hidden microphone under his shirt, Homer uncovers that his coworker Charlie is leading a militia planning to assault all government officials, and has him arrested by the FBI for conspiracy.
Impressed, Johnson reveals to Homer that in 1945, President Harry S. Truman printed a one trillion-dollar bill to help reconstruct post-war Western Europe and enlisted Montgomery Burns to transport the bill.
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