The Mentalist's Simon Baker is directing the series for the last time, and his upcoming episode may put an agent undercover while murder plays out on screen.

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Baker usually has his hands full portraying the aloof faux psychic Patrick Jane, but the Australian actor is currently splitting his time between directing and acting for "The Silver Briefcase." Set to air as the fifth installment of season 5, "The Silver Briefcase" will give Agent Michelle Vega (Josie Loren) a makeover.

Fresh out of the academy at the start of season 7, Vega may get to try her hand at a little undercover work in the Jordan Harper-penned episode. To do so, Vega will switch up her hairstyle.

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"There's a reason I've never gone blonde. Apparently [The Mentalist] didn't get the memo," Loren captioned a photo (see above) of herself donning a blond wig. "Happy I do NOT wake up like this."

As per usual, the new case will involve Agent Abbott's [Rockmond Dunbar] team in a murder. While the details of the grisly crime remain obscured, Harper watched the act cast enact the death during filming.

"Just another Friday night spent watching a murder acted out over and over again," Harper tweeted on Friday.

Find out more when the Mentalist returns to CBS for a final season this winter. Click the video below catch up on the final moments of season 6.

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The Mentalist, Television, CBS