The Mentalist Episode Stills from "The Scarlet Letter"

On this week's episode of The Mentalist, the team investigates the murder of a senator's intern. Welcome to the really ugly side of politics.

Meanwhile, Jane attempts to discover what new information Bosco has turned up on the Red John case. Click on the photos below for an early look at scenes from "The Scarlet Letter."

Remember to check TV Fanatic each week for the latest The Mentalist quotes. For now, we've posted the official CBS preview for Thursday's episode below: