The season finale of Season 14 of the American procedural drama television series Chicago Fire, which aired on NBC on May 13, 2026. Titled 'Thank You', the episode featured a dramatic explosion trapping members of Firehouse 51, a cliffhanger ending, the promotion of Kelly Severide to Chief, and marked the departure of longtime showrunner Andrea Newman.

A pivotal episode in the One Chicago franchise, concluding the 2025-2026 television season with high-stakes action, character developments, and teases for future storylines involving Squad 3 and Truck 81.