The Mentalist: Season 4

Patrick's sanity is questioned when he kills the man that he believes is Red John, but the evidence suggests that his victim was an innocent man.

Patrick conspires to get the old team back together after he is reassigned to a new team investigating the murder of a fitness trainer.

A nine-year-old boy is kidnapped, and the mother is one of Patrick's former clients who refuses to believe that he conned her.

As the team meets its new boss, Patrick tries to prove that a man he encountered at a political rally is a potential mass murderer, while Lisbon tries to prove that a confessed killer at the same rally is innocent.

CBI tries to figure out who killed a woman found on the beach of San Felix Island off the California coast.

While CBI tries to solve the murder of a police chief, Lisbon's bounty hunter brother meddles with the investigation when the man he's tracking becomes a suspect.

CBI is on the hunt for a serial killer, but Patrick soon suspects that a blogger who is obsessed with the case may actually be the killer.

CBI tries to figure out who killed an undercover narcotics officer who was killed in an alley outside a nightclub where she was investigating a drug dealer.

After the assistant of a retired pro quarterback is accidentally killed instead of the quarterback himself in a car explosion, the CBI pretends that the quarterback was killed instead in a plot to flush out the real killer.

While investigating the murder of a firefighter, Patrick loses his memory after nearly being drowned by the killer.

While the team investigates the death of a divorce attorney, Patrick discovers that Red John may still be alive and stalking an FBI agent who is asking too many questions.

While CBI investigates the murder of a crime boss's son, Grace is stuck in the forest with a belligerent witness after a crash while escaping from an assassin.

A disgraced fashion designer is murdered right before he makes his big comeback, and agent Darcy begins to suspect that the man Patrick killed is not Red John.

Patrick believes that a woman on trial for murder is innocent, and convinces Lisbon to open an investigation just as the jury begins its deliberations.

A killer that Patrick helped put away is furloughed so that she can help CBI solve a murder, but will the romantic chemistry between the two interfere with the investigation?

A man trying to expose Visualize cult leader Bret Stiles is murdered, and Patrick suspects that a member of Visualize's inner circle is trying to frame Stiles for his death.

While CBI tries to get a smug business owner to confess to a murder, FBI agent Darcy asks for Patrick's help with her murder investigation. Her real motive is to find out more about Patrick's relationship to Red John.

As CBI tries to figure out who murdered a terminally ill cancer patient who only had weeks to live, Cho's addiction results in a near-tragic mistake in the field.

Patrick discovers that an old magician friend is being forced to rob the casino where he works in order to rescue his kidnapped girlfriend.

The investigation of the murder of a high school English teacher gives Patrick an opportunity to show off his acting skills to a drama class.

Jane and the CBI gang get involved in the world of Drag Queen Cabaret when a body is found burned to death in the alley behind their theater.

The investigation into the death of a surfer gets Lisbon back in touch with an old flame, while Summer makes a fateful decision that could affect her relationship with Cho.

While Patrick contemplates whether to give up trying to find Red John, his unorthodox methods of getting confessions out of murder suspects may have finally crossed the line.

After leaving the CBI, Patrick appears to be down and out in Las Vegas. But it is really part of his master plan to make Red John think he has given up on trying to catch him.