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The Night Agent adds Abigail Breslin, David Denman ahead of final season

By Tyler Brooks May 6, 2026

has filled out its main cast for a fourth and final season, adding and as new series regulars and in a major recurring role. Production on the thriller began Monday in Los Angeles.

is returning as Peter Sutherland as the series shifts after two seasons in New York. , Trevante Rhodes, Li Jun Li and Elizabeth Lail were recently added as series regulars, giving the final run a crowded new lineup as the show moves to Los Angeles.

Breslin will play Cahlin, a young FBI agent working on Duval’s investigation into Night Action, while Denman is set as Ford, a veteran CIA agent and former head of a Joint Terrorism Task Force. Gish will play Holland, an FBI agent who joins the DOJ investigation into Peter Sutherland, and Welliver is set as Duval, a special DOJ prosecutor. Rhodes will portray Dom, Peter’s new partner, with Li playing Dom’s wife, Min, and Lail as Peter’s ex-fiancée Zoe.

The Night Agent is an action thriller from creator, executive producer and showrunner Shawn Ryan and , and the cast overhaul signals a final season built around Peter’s world widening rather than shrinking. Deadline previously reported the earlier casting additions, but the new roles make clear how much of the story will now turn on overlapping federal investigations, old relationships and the people pulled back into Peter’s orbit.

For viewers, the answer is already in the cast list: this last season is setting up as Peter’s most crowded and most consequential fight yet, with Los Angeles replacing New York as the backdrop and the show closing with a larger field of allies, adversaries and former allies than ever before.

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