The sixth season of the CBS police procedural series The Mentalist, created by Bruno Heller, premiered on September 29, 2013 and concluded on May 18, 2014.

The season features the endgame of Patrick Jane's long feud with his archnemesis, the serial killer Red John.

[2] On August 7, 2013, it was announced that characters Wayne Rigsby and Grace Van Pelt, played by Owain Yeoman and Amanda Righetti, both of whom had been on the series since the first episode, would be leaving.

[3] Emily Swallow and Rockmond Dunbar were cast as Kim Fischer and Dennis Abbott, two recurring characters with the potential to become series regulars.

[9] The production team created a sign for the fictional "Borrego Gas Diner" to stand-in for the local bar and restaurant Ski Inn.