It originally aired on the Fox network in the United States on May 19, 2013, in conjunction with the season finale, "Dangers on a Train.

The Icelandic band Sigur Rós guest starred and scored original music for the episode, along with their own interpretation of the Simpsons opening theme.

Marge becomes annoyed at their play-fighting and insists they go to a museum, but the main attraction is The Science of Ki-Ya Karate Monsters.

At another exhibit on probability, Homer becomes fascinated by a video featuring Blaise Pascal that discusses the odds of winning the lottery.

Later, Homer, Lenny, Carl and Moe's weekly lottery ticket wins them $200,000 which they agree to share four ways.

When they find Carl, they learn he came to clear his family name by buying a lost page from the saga that will reveal that the Carlsons were brave warriors.

However, they learn that the Carlson ancestors were not just cowards but were collaborators who joined the barbarians in looting, arson, and mass murder.

Impressed by his good qualities, the people forgive the Carlson family so they can show their faces in public again.

[6] To promote the episode, a poster was released showing Homer, Lenny, and Moe chasing Carl with Sigur Rós overhead.