Bonnie Somerville, Diane Farr Bonnie Somerville, Diane Farr

The Mentalist has recruited Numb3rs' Diane Farr and Friends' Bonnie Somerville to guest-star in an upcoming episode, TVLine reports.

Farr, 42, will play Amy, a Type-A owner of a small Northern California winery. Somerville, 37, will play Amy's friend and business partner, who is accused of murder.

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Desperate Housewives' Kathryn Joosten will guest-star as the murder victim's neighbor, and True Blood vet James Frain will also appear. The episode is slated to air sometime in February.

Farr most recently guest-starred on CSI: Miami. Somerville recently appeared in the Hallmark TV movie Holiday Engagement.

The Mentalist airs Thursdays at 10/9c on CBS.