Palace have completed the league double over Charlton six times, in 1926–27, 1927–28, 1964–65, 1968–69, 1989–90, and 2012–13. Charlton have done it twice, in 1999–2000 and 2007–08. Palace's longest unbeaten run in the fixture is nine games between 1993 and 1996, where they won six and drew three, including knocking their rivals out of the 1996 First Division Play-offs.