Matthew "Matt" Casey is a fictional character on the NBC drama Chicago Fire, portrayed by actor Jesse Spencer.

[5] As the leader of the truck company, Casey's cool, standoffish demeanor and no-nonsense attitude sometimes put his crew off, but he is respected by them and highly regarded by Chief Boden.

[6] He trusts the men of his truck company implicitly (and vice versa) and is generally quite lax with them in good faith that they will maintain professional standards themselves,[7][8] only disciplining them when he has no choice.

In the season 10 episode "Two Hundred" Casey moves to Oregon to take care of Andrew Darden's sons, becoming their legal guardian, but maintains a long-distance relationship with Brett.

For example, he was "consulted" by Herrmann on renovation works and building code compliance for Molly's and built a ramp for a paraplegic accident victim he and his men had rescued.

Although they try to remain professional in front of their men, their spats often make their way into the firehouse off duty to the point where they indirectly insult each other, with newest candidate Peter Mills getting caught in the crossfire.

Both are known to their men as intensely guarded and reticent about their personal lives but they confide in each other, usually over a beer or sharing a cigar on the firehouse roof.

In the season 2 episode "Not Like This", Casey risks his life to save a baby in a burning building and is rushed to the hospital in critical condition.

When he gets back on the job, he suffers from neurological symptoms such as memory loss, uncharacteristic outbursts of anger and headaches but keeps this from his colleagues, although his erratic behavior is quickly picked up by several veteran coworkers and Dawson.

When he begins to bleed from his ear, he sees a doctor who tells him that it was caused by a crack in his skull and warns him that another hit to the head could be catastrophic.

Casey eventually gets help from Dawson's friend, Isabella, to get Heather moved to a minimum security facility so that she can see Griffin and Ben more often.

In the episode "No Regrets", Heather gets released due to overcrowding and she moves to Florida because she can't live in Chicago without being reminded of both her husband and friend's death.

This puts off his plans for a while but months later in "Wow Me", Casey proposes to Dawson again at the Fire academy, and she happily says "yes" even before he can finish the question.

[5] It is revealed that Katya had been compiling a notebook of evidence with the intention of exposing the trafficking ring running out of Nesbitt's nightclub.

His inner turmoil is somewhat assuaged when Dawson, who is temporarily on desk duty at the Office of Fire Investigation, reveals to him that she is pregnant with their child.

They intended to keep the secret "in-house" but word eventually spreads to their colleagues, even to their contemporaries at the CPD,[11] but Dawson suffers a miscarriage.

Casey's relationship with Dawson became strained when they disagree over her decision to foster Louie, a boy they had rescued who had no listed next of kin.

In the season 5 finale "My Miracle", Casey's life is left hanging in the balance when he is trapped in a warehouse fire along with Herrmann, Mouch, Kidd, Otis, Severide and Kannell.

In the season 6 premiere "It Wasn't Enough", Boden makes the call to open up the water cannon, ordering the men to take cover any way they can.

They are in dress blues for this, but it turns out Casey receives a medal of valor after the fire and he along with the rest of Firehouse 51 return to normal lives.

In "An Even Bigger Surprise", he is recommended for promotion to Captain after rescuing a suicidal mentally unstable person from jumping off a building.

In "Slamigan", Casey and Dawson are awarded temporary foster guardian of Bria Jamison, a runaway teen who has an addict father and family members who want nothing to do with her.

In "Law of the Jungle", in the middle of a call of a warehouse fire, Casey and Severide jump off the roof as it explodes.

After a fight in the last episode, Gabby tells Matt she'll be right back and goes to ask about a job in Puerto Rico while he stays home, not sure where his wife has gone.

In "Going to War", while fighting an apartment fire, Brett expresses blame to Casey for letting Gabby go, only for him to tell her there was nothing anyone else could do.

In "Move a Wall", as he deals with his post-traumatic stress stemming from the events, he takes it out on Herrmann when Ritter gets injured on a call.

In "Double Red", While on the scene of a call, Casey is hit by an uncooperative drunk driver and he fears that his career at the fire department may be over.

In the season 10 episode "Two Hundred", Casey moves to Oregon to take care of Andrew Darden's sons as well as he applied to Portland Fire Department.

However, Matt helps her through a very difficult time of not only reconnecting with her birth mother, but in the aftermath of her death and the possibility of raising her new baby half-sister on her own.

The animosity has since faded some since Voight saved him from being shot by Jack Nesbitt in the nick of time and assisted Boden in several arson-related investigations.