Emma Caulfield Cast on Royal Pains

Ex will soon mark the spot for Emma Caulfield on Royal Pains.

The actress (Leverage, Once Upon a Time) has been cast on a pair upcoming Season 4 episodes, USA Network sources confirm, coming on board as Winnie, a baker from New Jersey who used to date Hank.

What brings Winnie in to the picture? What effect will she have on this Hamptons-based doctor? Both good questions, both of which will be answered this December when Caulfield debuts and Royal Pains returns to wrap up Season 4.

Its final summer episode airs on September 19.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.