The 1985 World Series began on October 19 and ended on October 27. The American League champions Kansas City Royals played the National League champions St. Louis Cardinals and won the series four games to three. The Series was popularly known as the "Show-Me Series" or the "I-70 Showdown Series," as both cities are in the state of Missouri and are connected by Interstate 70.

The Cardinals won the National League East division by three games over the New York Mets, then defeated the Los Angeles Dodgers four games to two in the National League Championship Series. The Royals won the American League West division by one game over the California Angels, then defeated the Toronto Blue Jays four games to three in the American League Championship Series.

The Cardinals were seeking to win their NL-leading 10th World Series title, while the Royals were seeking their first World Series title. The Royals were completing one of the most successful decades by any expansion team, with six division titles and two pennants from 1976 to 1985. This was the first World Series in which all games were played at night. Also, this was the first World Series to feature television commentator Tim McCarver, who called the games for ABC with Al Michaels and Jim Palmer. (Howard Cosell was originally scheduled to be in the booth with Michaels and Palmer, but was removed from his assignment just prior to Game 1 because of the controversy surrounding his book I Never Played the Game.) McCarver would go on to call a record 24 World Series telecasts for various networks.

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