Facebook / Chicago Fire

Casey and Dawson will face another bump in their relationship.

In "Chicago Fire" season 4 episode 20, titled "The Last One for Mom," Matt Casey's previous heroic deed will get him into trouble with his girlfriend, Gabriela Dawson. Political consultant Susan Weller (portrayed by Lauren Stamile) was quick to see potential in Matt, after his video accompanying Victor became viral. However, Gabriela will sense that there's something more she could want.

In an Ask Ausiello article on Tv Line, executive producer Matt Olmstead shared that Gabriela will observe Susan from a distance as she becomes "a little bit suspicious of this woman's intentions." However, she tries her best not to meddle to avoid coming across as a jealous girlfriend.

Gabriela is not the only one Matt should be concerned with. He will receive a package that gets him into trouble with the Board of Ethics. Meanwhile, his friend Kelly will be faced with a difficult situation as well.

Detective Holloway will testify in court against the Mexican cartel after successfully going undercover to find out about their operations. Like she did in the previous episode, she will entrust her 9-year-old son to Kelly. The cartel has threatened and it looks like they are not joking and Kelly will be forced to involve himself in the process.

On the firehouse front, a rescue mission involving an art building will get one of their own in a life-threatening situation. A victim will be trapped inside a near-collapsing building on fire, and Joe Cruz will brave all odds. However, saving a victim's life will put his own in danger as well.

The season is nearing its end and more buildup to the finale is expected in the coming episodes. Will Kelly's actions endanger some of the people close to him? Will Matt consider a career in politics? Will Joe survive the fire?

Find out on "Chicago Fire" season 4 episode 20 on Apr. 26, Tuesday, at 10 p.m. on NBC.