According to TV Guide, Benz will play a lesbian farmer on the hit USA Network show.
Benz will play Elyse, a wife to Anna and mother to Libby, who needs Dr. Hank's (Mark Feuerstein) help after a farming accident.
Benz's 'Royal Pains' episode airs August 3.
The 'Dexter' veteran previously played a lesbian stripper on 'Desperate Housewives.'
Benz can next be seen in CBS's 'A Gifted Man,' Fridays this fall. She'll play sister to Patrick Wilson's main character, a doctor who begins to see visions of his dead ex-wife.