Chicago Fire follows the firefighters, rescue squad and paramedics of Firehouse 51 — the anchor of Dick Wolf’s One Chicago franchise, created by Derek Haas and Michael Brandt. Taylor Kinney, David Eigenberg, Miranda Rae Mayo and Dermot Mulroney lead the Season 15 cast. It airs Wednesdays at 9 p.m. ET/PT on NBC.
Season 15 premiered October 7, 2026 with 6.12 million total viewers and a 0.45 rating in adults 18-49 (Nielsen Live+Same Day) — the most-watched program of its premiere night across broadcast, with the demo rating up 9% from the Season 14 premiere.
One cast note reported by the entertainment press: original cast member Joe Miñoso (Joe Cruz) is confirmed to exit in the show’s 300th episode, airing November 4, 2026. No Season 16 announcement had been made as of October 22, 2026.
The Facts
Network: NBC · Wednesdays, 9 p.m. ET/PT
Season: Season 15 · premiered October 7, 2026
Cast: Taylor Kinney, David Eigenberg, Miranda Rae Mayo, Dermot Mulroney
The number: 6.12 million viewers and 0.45 in adults 18-49, season premiere (Nielsen Live+Same Day)
Status: Season 16 not yet announced
Sources: Nielsen Live+Same Day (Big Data + Panel) premiere figures published by CBS (Paramount Press Express, October 15, 2026), ABC and NBC for the fall 2026 premieres; TheWrap and TVLine ratings roundups. Read October 22, 2026. Photo credit on the image above.
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