Last updated: 7 November 2026
Trinity, a political thriller from Bodyguard creator Jed Mercurio, premieres on Netflix on Tuesday, 1 December 2026. Gugu Mbatha-Raw and Richard Madden lead the series, which has seven episodes of about an hour each.
What Is Trinity About?
Commander Katherine Decker (Mbatha-Raw) is second-in-command on the nuclear submarine USS Kansas. She forms an unlikely bond with Secretary of Defense Webb Preston (Madden).
That bond pulls her into the secrets around a top-secret programme called Trinity. She ends up caught between backing Webb’s plan to prevent World War III and exposing what he is hiding.
The trailer opens with a near-launch of a tactical nuclear weapon at “phantom” contacts that vanish from radar.
Richard Madden and Jed Mercurio, Together Again
Madden starred in Mercurio’s Bodyguard in 2018, winning a Golden Globe for it. Trinity reunites them. Mercurio, also behind Line of Duty, is the creator, writer and showrunner.
Trinity Cast
| Actor | Character |
|---|---|
| Gugu Mbatha-Raw | Commander Katherine Decker |
| Richard Madden | Secretary of Defense Webb Preston |
| Marcia Gay Harden | Margaret Vandenburg |
| JD Pardo | Tom Reyes |
| Bruce Greenwood | Special Agent Eric Colby |
| James Remar | President Paul Barnard |
| Robert Wisdom | Admiral Griff Tatum |
| Kirk Acevedo | Captain Jock Campbell |
Episodes and Production
Netflix ordered Trinity in June 2025 with eight episodes, but the final count is seven, per What’s on Netflix. Michael Cuesta directed the pilot, and the series was filmed in Vancouver.
Shows Like Trinity
Netflix itself points fans to Bodyguard, Treason, Zero Day and Hostage.
More Netflix drama coming soon: Unaccustomed Earth and Always on Call.
FAQs
When does Trinity release on Netflix?
Tuesday, 1 December 2026.
How many episodes does Trinity have?
Seven, each about an hour long.
Who created Trinity?
Jed Mercurio, creator of Bodyguard and Line of Duty.
Who plays the Secretary of Defense in Trinity?
Richard Madden plays Webb Preston.
