Robyn Coffin

Tension builds when a group of rabble-rousers attempts to lock down the firehouse. Brett is faced with a monumental decision and Cruz readies himself for a big day. Gallo and Ritter attempt to launch Firehouse 51 into the social media age.

While running a secret off-duty errand, Dawson finds herself trapped in a collapsed parking structure.

A warehouse blaze puts the fire and rescue squad at risk, Dawson's father overstays his welcome at Dawson and Casey's home, Casey fights for his first responders bill, Mouch makes a serious decision, and Herrmann tries to make a young boy smile.

When the squad is summoned to the scene of an accident, Chief Boden makes a split-second decision that overrides a fellow Chief.

Firehouse 51 responds to a dangerous structure fire that leaves one of their own in jeopardy. Borelli confronts Boden about his brother's death.

Kidd must prove herself at the National Firefighter Leadership Conference, while the rest of Firehouse 51 is called to two eerily similar car wrecks. Mouch tries to keep the firehouse informed by starting a newsletter and Cruz deals with a heartbreak.