[s4e18] On The Warpath Apr 2026

: Firehouse 51 responds to a dangerous fire in a former bank that has been converted into a bar, where they must rescue several people trapped inside a vault.

: Randall "Mouch" McHolland experiences a bout of cold feet before his wedding to Trudy Platt. After some encouragement from Christopher Herrmann and Kelly Severide, he follows through, and the two officially tie the knot at Molly's Bar. [S4E18] On The Warpath

In the episode " On the Warpath " (Season 4, Episode 18), the story follows Sylvie Brett as she experiences a traumatic event while on duty . While tending to a victim with a leg wound, she witnesses a shooter arrive to finish the man off. The shooter then threatens her life, warning her not to go to the police. Meanwhile, several other key storylines unfold: : Firehouse 51 responds to a dangerous fire