That's because her character, an environmental activist named Summer Higgins who protests industrialized farming in Montana, interacts with someone from the Dutton clan. And if you recall, the lives of patriarch/rancher John Dutton (Kevin Costner), daughter Beth (Kelly Reilly), and son Kayce (Luke Grimes) are hanging in the balance after that explosive season 3 cliffhanger of the Paramount Network drama.
"When John Dutton or Rip [Cole Hauser] want to get rid of people, they talk about taking them to the train station," Perabo tells EW. "I don't want to be taken to the train station!"
So you'll have to settle for an exclusive first look of Perabo as Summer, seen here in cuffs and a frown. We're guessing her protesting didn't go over too well with the law.
Cam McLeod/Paramount + Piper Perabo on 'Yellowstone.'
Other new cast members joining season 4 include Jacki Weaver (Silver Linings Playbook) as Caroline Warner, the CEO of Market Equities; Kathryn Kelly (Nashville) as Emily, a vet tech who cozies up to a cowboy; and Finn Little (Storm Boy) as Carter, a young boy who's like a miniature version of Rip (Cole Hauser). If you haven't caught up yet on the drama, Yellowstone follows ups and many downs of the Dutton family, owners of the largest ranch in the United States.
Season 4 of Yellowstone debuts Nov. 7 on Paramount Network.
For more from our Fall TV Preview, order the October issue of Entertainment Weekly or find it on newsstands beginning Friday. Don't forget to subscribe for more exclusive interviews and photos, only in EW.