The Mentalist's Owain Yeoman has wrapped on filming for his role as Wayne Rigsby, but there is still plenty for viewers to look forward to.

Earlier in the season, TV Line announced that Rigsby and Grace Van Pelt (Amanda Righetti) will be departing the CBS drama by midseason. Now that the series has moved into the post-Red John world, Dennis Abbot (Rockmond Dunbar) and Kim Fischer (Emily Swallow) have usurped the married couple's positions in Patrick Jane's (Simon Bakers) life. Just as the former CBI agents stumbled onto a deadly conspiracy in "The Golden Hammer," Yeoman took to Twitter to announce he had finished work on his final episode, which will be titled "White as the Driven Snow," and air as episode 15.

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"My last Mentalist Day ever! Goodbye Rigsby- I will miss spending time with you buddy. Thanks for 6 great years!" the actor wrote on Jan. 20.

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However, the battle to find who is spying on old CBI agents has already claimed one life (see video below), and more death may be in store. Based on a photo from The Mentalist's police and technical advisor Karl Sonnenberg, part of "White as the Drive Snow" will take place in a hospital.

The Mentalist airs Sundays at 10 p.m. ET on CBS.