Filming in Italy, the star reflects on Kate Wyler’s fractured marriage, her “tennis match” chemistry with Rufus Sewell and the freedom she’s found in one of TV’s smartest dramas.

It’s almost 1 a.m. in Florence, Italy, where Keri Russell is nearing the end of filming for season four of The Diplomat, Netflix’s savvy political drama created by TV vet Debora Cahn. It’s been a hectic few days of night shoots across the Atlantic, but as she hops on our call, an ebullient Russell is eager to gab. “I just got home, I’ve wolfed down two bites of pasta and I’m sipping a glass of wine,” she says. “I’m ready for you.”

The Diplomat asks a lot of Russell, from intricate emotional shifts to the dense jargon of top-secret international relations, but just as she does on camera, she carries it all with a disarming ease after a long day’s work. Russell has settled into the role of Kate Wyler, a diplomat who’s been thrust to the center of a high-stakes global crisis while navigating her turbulent marriage to fellow insider Hal (Rufus Sewell) and her even more complex relationship to her own ambitions.

“There is something that you can’t manufacture when you have years of experience with people,” Russell says. “It’s like slipping on a comfortable pair of shoes. That’s the benefit of good series work.” Russell is familiar with this trajectory, which is the goal whenever embarking on a new continuing TV show. Her breakout on college drama Felicity won her a Golden Globe and lasted four seasons; before jumping into The Diplomat, she’d finished a critically lauded six-season run on FX’s Emmy-winning spy drama The Americans, where she also met her romantic partner, co-star Matthew Rhys.