Lisbon's undercover mission to prison will turn deadly on The Mentalist.

'The Mentalist' 'The Silver Briefcase' Plot Revealed, Patrick Jane Takes On A Powerful Nemesis

Agent Lisbon (Robin Tunney) will easily slip into an orange jumpsuit when she checks into "The Graybar Hotel," but devising a prison break will prove infinitely more dangerous.

When Lisbon's plans to get an inmate to flip on her boyfriend go awry, the only way to solve the FBI's current case will involve a crafty escape from within the prison walls, according to Entertainment Weekly.

'The Mentalist' Series Finale Title Announced, Is It Time For Wedding Bells?

Unfortunately, Lisbon's plan will quickly take a turn for the worse. Never fear! The agent's new boyfriend will be ready to jump into the fray to protect her, and Entertainment Weekly reports that Patrick Jane's (Simon Baker) sudden involvement will put him in contact with an old familiar face.

While no one listed for the episode has previously appeared in a Mentalist episode, Entertainment Weekly may be referring to Stella Baker, an actress that bears the same name as Simon Baker's daughter and is set to play "Angry Inmate."

Click the video below to see a preview for "The Graybar Hotel."

The Mentalist airs Sundays at 9 p.m. ET on CBS.

Tags
The Mentalist, Television, CBS