The third season of Chicago Fire, an American drama television series with executive producer Dick Wolf, and producers Derek Haas, Michael Brandt, and Matt Olmstead, premiered on Tuesday, September 23, 2014, at 10 pm on NBC television network and concluded on May 12, 2015.

The show follows the lives of the firefighters and paramedics working at the Chicago Fire Department at the firehouse of Engine 51, Truck 81, Squad 3, Ambulance 61 and Battalion 25.

Firehouse 51 receives a call of a woman in a burning flipped car and race against the clock to rescue her.

In the next call, a basement fire, Severide discovers a box of pictures of young children on the victim he rescued and realizes it is a crime scene of a pornographic ring.

This episode begins a crossover with Law & Order: Special Victims Unit and Chicago P.D.

A bad situation turns even worse when a grenade-carrying madman who claims to have a deadly airborne disease causes an explosion in the ER.

Severide is severely injured and considered a black tag but Mills refuses to give up.

Dawson gets stuck back on the ambo while Boden finds someone permanent to replace Mills.

Kelly visits April after he hears she doesn't work at the hospital because she wants to take a break and travel the world.

Firehouse 51 has a farewell party at Molly's as Peter Mills decides to leave his friends and his firefighting career to move to North Carolina to be with is family and the restaurant.

Members of the CPD team up with the Special Victims Unit to investigate, which has similar characteristics to cases that has eluded SVU for more than 10 years.

and Law & Order: Special Victims Unit that continues on "The Number of Rats" (Chicago P.D.

NBC renewed Chicago Fire for a third season on March 19, 2014 which premiered on September 23 that same year.