Jeopardy! Battle of the Decades

The Jeopardy! Battle of the Decades was a special 5-week tournament airing throughout the 30th season of the television game show Jeopardy! to commemorate the 30th anniversary of the daily syndicated version of the show, hosted by Alex Trebek. The tournament involved 45 previously successful Jeopardy! contestants split into three groups based on the time period of their initial appearance on the program. Though the groups roughly represented 1984-1993, 1994–2003, and 2004–2013, they were referred to as the 1980s, 1990s, and 2000s, respectively. The tournament's 1980s round began airing on February 3, 2014 with the tournament's final episode airing that year on May 16, covering 25 shows in total. The tournament's grand prize was US$1,000,000.Brad Rutter won the $1,000,000 cash prize, once again giving Rutter the highest game-show winnings in history.

The Battle of the Decades was conceived by Jeopardy! executive producer Harry Friedman. Knowing that the Trebek version was nearing its 30th anniversary, he and other producers of the program contacted every still-living Jeopardy! contestant who had ever participated in a Tournament of Champions to see if they would be interested in making another appearance on the program. The many people who expressed interest were asked to submit a video and an essay of several paragraphs, discussing why they should reappear. In the end, the list was narrowed down to 45 contestants, with 15 players from each "decade" the Trebek version had been airing.

For each "decade," one participant was selected by the viewers in an online poll on the show's Twitter account and official website, with the choices coming from a producer-created shortlist.

The tournament was played in four separate rounds. Three preliminary rounds were played, one per "decade"; in each round, the 15 participants from that "decade" competed against each other in a series of five games. Only the winner of each game advanced, while the other players received $5,000 each. The fourth and final round was played according to the show's traditional two-week tournament format, with a week of quarterfinal games between the 15 winners from the preliminary rounds. Each of these five games included one player from every "decade." The winners advanced, as did the four non-winners with the highest scores (the "wild card" positions). The nine remaining players competed in three semifinal games (though the decades were now ignored for the seeding), and only the winners advanced to the two-game final match. The finalists' scores over both games were added to determine the overall standings, with $1 million awarded for first place, $100,000 for second, and $50,000 for third. Players eliminated in the semifinals and quarterfinals received $25,000 and $10,000, respectively.

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