07/26/2012 04:18 pm ET

'Royal Pains': Rosanna Arquette Searches For Her Family & Heads To Shadow Pond On USA Show (EXCLUSIVE)

A member of the famous Arquette family is headed to the Hamptons this fall.

Rosanna Arquette has signed on for a three-episode arc on USA's medical dramedy "Royal Pains." Arquette will play Louise “Lou” Hunter, a mysterious woman from New Mexico who spent her entire life trying to find meaning and purpose. Now that she has gotten her life in order, Lou heads to the Hamptons to find her family, and she begins her search at Shadow Pond -- Hank (Mark Feuerstein) and Evan's (Paulo Costanzo) home.

The actress will make her "Royal Pains" debut on the Wednesday, September 5 episode. "Royal Pains" airs Wednesdays at 9 p.m. ET on USA.

Emmy Nominees 2012