Matthew Casey is a firefighter and the protagonist of Chicago Fire.
Hallie Thomas Edit
Casey was engaged to Hallie Thomas. After engaging in a rescue and delivering a child at a vehicle accident, Casey asked Hallie Thomas if she wanted to have children. She did not. because of their different ideas for their future, Hallie cancels their engagement and moves away for a while, later she returns after realising how much she misses Casey. The two got back together and were dating again when Hallie died in a fire at the end of season 1. Casey has a hard time dealing with her death but eventually manages to find some closure and move on. =====
Gabriela Dawson Edit
Gabriela Dawson had a crush on him, until they went on a casual date at her cousin's Christmas party. He "kissed her on the cheek" when she tried to kiss him, and from then Dawson seemed mad at him. They seem to be content with each other now that the secret of Dawson and Peter Mills relationship is now out.
In season 2, after Mills breaks up with Dawson for various reasons (one being Dawson’s feelings for Casey) Dawson and Casey begin to spend more time together, partially because Casey has to look after Heather's children (even with his 24 hour shifts) and asks for help from Dawson and the rest of the fire house. After spending more time together Casey and Dawson decide for the moment they are happy just being friends. Casey eventually gets helps 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. She decides to move to Florida because she can't live in Chicago without being reminded of both her husband and friend's death. This deeply saddens Casey, but understands Heather's reasons for leaving. In the episode You Will Hurt Him, Casey and Dawson wake up in bed together the next morning. Dawson still has doubts and fears about Casey's commitment but he tells her "I had a chance at this a year ago and I blew it. I've been regretting it ever since." He further assures his seriousness about his commitment by telling her "As far as I'm concerned, it's our time now." They kiss confirming and starting a relationship. In episode 3x02 Casey proposed to Dawson at the Fire academy but before he could finish asking the question Dawson gave her answer "Yes". The two then go home to have sex. However their happiness was short lived because of Dawson joining truck 81 they could not get married. In episode 3x07 the two share their feelings about how they would do anything if they could get married now and seal it with a kiss. This is also short lived because after they were caught kissing in his truck, things start to go downhill for the couple. Dawson eventually breaks up with Casey in season 3 episode 11.
Kelly Severide Edit
Kelly Severide and Matthew Casey are coworkers and lieutenants at the fire station. At the beginning of season one, after the death of a close friend, they had some trouble getting along and often butted heads, but would come together for the sake of the house. Now in season 2 they have stopped blaming each other and get along very well. They are often seen putting themselves in danger to protect each other, such as when Kelly went into an unstable burning building to help Casey find his fiancé. After Casey was injured in episode 2x10, Kelly was the first to notice that he was not healed. He was very concerned about Casey, asking him numerous times If he was okay and offering help. The two are close friends.
Following Shay's death, Severide moves in with Casey and Dawson. Severide and Casey become roommates after Dawson moves out. Some of the strain on Casey and Dawson's relationship comes from Casey and Severide's relationship; with Casey putting Severide in front of Dawson, Such as when Dawson tells Casey to ask Severide to move out and Casey responds by saying Severide "is going to need [him] on his side, so good or bad that's where [he'll] be".
In season 3 episode 15, Severide instantly turns down an order from his chief to spy on Casey. He also tells the chief that Casey is "one of the finest firefighters [he's] ever had the opportunity to work with in the entire CFD."
Severide is the only person on the show, besides Dawson, to call Casey by his first name. Casey is the only person on the show to call Severide by the nickname, Sev.
"It's okay to cry here. I have." - Casey 2x06
"There is no greater love than to lay down ones life for another, this badge case stands as a memorial to the fallen firefighters and paramedics who lost their lives in service to the citizens of Chicago" - Casey 2x06
(To Severide) "I was going to ask you for relationship advice, but that would be like asking Mouch for fitness tips"
|Season 1 Appearances|
|"Pilot"||"Mon Amour"||"Professional Courtesy"||"One Minute"||"Hanging On"|
|"Rear View Mirror"||"Two Families"||"Leaving the Station"||"It Ain't Easy"||"Merry Christmas, Etc."|
|"God Has Spoken"||"Under the Knife"||"Warm and Dead"||"A Little Taste"||"Nazdarovya!"|
|"Viral"||"Better to Lie"||"Fireworks"||"A Coffin That Small"||"Ambition"|
|"Retaliation Hit"||"Leaders Lead"||"Let Her Go"||"A Hell of a Ride"|
|Season 3 Appearances|
|"Always"||"Wow Me"||"Just Drive the Truck"||"Apologies Are Dangerous"||"The Nuclear Option"|
|"Madmen And Fools"||"Nobody Touches Anything"||"Chopper"||"Arrest in Transit"||"Santa Bites"|
|"Let Him Die"||"Ambush Predator"||"Three Bells"||"Call It Paradise"||"Headlong Toward Disaster"|
|"Red Rag the Bull"|