| The Mentalist | |
|---|---|
| Season 4 | |
 DVD cover | |
| No. of episodes | 24 |
| Release | |
| Original network | CBS |
| Original release | September 22, 2011 – May 17, 2012 |
| Season chronology | |
The fourth season of the CBS police procedural series The Mentalist premiered on September 22, 2011 and concluded on May 17, 2012. The season picks up immediately after the events of the third-season finale in which Patrick Jane (Simon Baker) was arrested for the public murder of the man he believes is the notorious serial killer Red John, who murdered his wife and daughter.