The Mentalist comes back with a fresh episode Sunday on CBS, with an episode called "Red Lacquer Nail Polish." In this episode, the California Bureau of Investigation looks into a murder in a chilling mansion. Next week, viewers are taken back to another major Red John episode with the return of Lorelei Martins and a viewer-suspected Red John, Bob Kirkland.

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Lorelei Martins (Emmanuelle Chriqui) returns on 'Mentalist' Season 5. (Image: CBS/The Mentalist)

Mentalist Season 5, Episode 16: 'There will be blood'

Lorelei Martins (Emmanuelle Chriqui) returns in this episode to piece together the puzzle behind the murder of her sister. In her last encounter with Patrick Jane, she learned that Red John may be involved in the raping and killing of her younger sister Miranda.

Jane showed Lorelei a photo of Miranda's murder scene, where "Roy" was written in Miranda's blood. Roy is one of Red John's aliases. Lorelei violently denied Red John's involvement, but she may have had a significant change of mind since. Jane told Lorelei to contact him once she had more information on Miranda's death, and now the time has come.

"Lorelei is not evil. She's just been doing these things because she's been brainwashed," Chriqui once said in an interview.

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Mentalist Patrick Jane and Teresa Lisbon: No more secrets?

Upon Lorelei's return, Jane will have to explain to his "partner" how he freed Red John's accomplice from prison. Viewers might learn about how Bret Stiles of Visualize became instrumental to the fulfillment of Jane's plan.

Lisbon, who insisted that Jane decides whether they're partners or not, is going to advance on the Red John mystery-solving case on a grey area. There are certain things that must be done for Jane's investigation style to work. And the line will blur between what's professional and personal for her.

Mentalist: When will Bob Kirkland show up again?

Mentalist fans can't wait to see Bob Kirkland (Kevin Corrigan) again. He has made only a couple of appearances so far, the first one of which, only his back was framed by the camera.

Kirkland is involved in the Lorelei Martins case. The first time Jane shook his hand, he didn't have a list of Red John suspects yet. He also didn't know that Kirkland sort of checked Lisbon out. It looks like viewers should enjoy this Sunday's episode as a build up for what is to come the following episode.

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