Overview
- Netflix released the first trailer and promotional images and announced that Trinity will premiere on Tuesday, Dec. 1, 2026, a move the streamer confirmed in its Nov. 4 marketing push.
- The series follows Commander Katherine Decker, a naval officer whose near‑launch incident on the USS Kansas draws her into a relationship with Secretary of Defense Webb Preston and a mystery tied to a program codenamed 'Trinity.'
- Gugu Mbatha‑Raw stars as Commander Decker and Richard Madden plays Secretary of Defense Webb Preston, reuniting Madden with creator Jed Mercurio, who serves as writer, showrunner and executive producer.
- Supporting cast and production credits were confirmed in the trailer release, with Marcia Gay Harden, JD Pardo, Bruce Greenwood and others listed and Michael Cuesta named as pilot director for a 20th Television and Hat Trick/HTM Television production.
- Public reporting differs on the season length — most outlets list eight episodes arriving Dec. 1 while at least one reputable outlet says the order was reduced to seven — a discrepancy that Netflix has not yet clarified.