TRINITY

Trinity Puts a Naval Commander at the Center of a Dangerous Global Conspiracy

Commander Katherine Decker has spent her career protecting her country.

Now she may have to protect it from one of the most powerful men in Washington.

Trinity stars Gugu Mbatha-Raw and Richard Madden in a seven-episode Netflix thriller combining military action, political intrigue and a dangerous relationship that could have global consequences.

Mbatha-Raw plays Commander Katherine Decker, a decorated naval officer serving as second-in-command aboard the USS Kansas, a nuclear submarine capable of delivering devastating firepower.

For Katherine, duty has always come first.

But everything becomes complicated when she develops an unexpected connection with Webb Preston (Madden), the charismatic United States Secretary of Defense.

With a background in technology and ambitious ideas about national security, Webb is determined to reshape America's defense strategy and prevent a global conflict.

Katherine finds herself increasingly drawn to his vision.

Then she discovers something that changes everything.

A top-secret program known as Trinity appears connected to a dangerous conspiracy operating at the highest levels of government.

As Katherine investigates, she begins questioning Webb's true intentions.

Is he secretly working to prevent World War III?

Or could his plans become the very thing that triggers it?

Caught between her growing feelings for Webb and her responsibility to her country, Katherine must decide whether to support the man she trusts or expose the secrets he may be hiding.

Created by Jed Mercurio, the writer behind Bodyguard, Trinity reunites Mercurio with Madden for another suspense-filled story about power, loyalty and dangerous government secrets.

The series also stars Marcia Gay Harden, JD Pardo, Bruce Greenwood, Robert Wisdom and James Remar.

Katherine has always believed in putting her country first.

Now she must decide whether the man promising to save the world could actually destroy it.

All seven episodes of Trinity begin streaming exclusively on Netflix December 1, 2026.