In 1947 fans were treated to their first taste of postseason basketball. More than 60 years later, the NBA playoffs—despite the lengthy eight-week span—are still one of the most intriguing postseasons in all of sports. Whether it's a No. 8 seed upsetting a No. 1 seed like the Warriors beating the Mavs in 2007, or the league's powerhouses meeting in the Finals like the epic Lakers vs. Celtics battles of the '80s, the NBA playoffs are must-watch TV. In anticipation of more classic moments and upsets to come this postseason (scared yet, Lakers fans?!), check out the 50 Best Series in NBA Playoff History.