NBC's firehouse drama show "Chicago Fire" aired an exciting crossover last week with members of the "Chicago P.D." and "Law & Order: SVU" teaming up to take down a murderer and rapist. With the crossover having now ended, what should the audience expect in Firehouse 51?

The fire squad is called to a church when a medical emergency takes place. As per the sneak peek clip of episode 22 named "Category 5", firefighters deal with a woman who becomes unconscious at a wedding. Towards the end of the clip, the woman appears to have taken medication for blood pressure. Ardent watchers of "Chicago Fire" are aware that their beloved firefighters are up for anything and can handle even the toughest situation.

But a wedding emergency won't be the only thing that the Chicago firefighters will be dealing with in the upcoming episode. SpoilersGuide has provided the episode's description, which clearly states that Lt. Casey will agree to go undercover in an effort to provide proof of Jack Nesbitt's shady dealings. After much prodding by Sgt. Voight, Casey takes up the task and puts his life in jeopardy while snooping around.

Meanwhile, Otis and Severide continue to disagree about the integrity of Scott Rice, causing tensions to flare up between the members of the squad and truck. Additionally, Hermann assists a fellow member of the firehouse. The episode aired for followers of "Chicago Fire" appears to be exciting and is the penultimate episode of season three, which means it will set the stage for the finale episode airing next Tuesday on May 12.

Entertainment Weekly reports that the forthcoming episode of "Chicago P.D." will see Lindsay blaming herself for Nadia's death, which took place during the crossover episode aired last week. Creator Matt Olmstead has revealed that "She (Lindsay) feels directly responsible for the death of Nadia."

Tune in to NBC on Tuesdays at 10 p.m. ET to catch "Chicago Fire".