In Chicago Fire's Season 5 finale, things come to a head between Casey (Jesse Spencer) and Dawson (Monica Raymund) thanks to their new houseguest: Dawson's father, who's fallen on hard times after a divorce and some subsequent financial troubles.
"Gabby's father comes to stay ... and it's causing massive friction between Casey and Dawson," Spencer told TVGuide.com at the NBC upfronts Monday.
A catastrophic fire will no doubt force Casey and Dawson to re-focus on what's really important... but will it be too late?
"We have a pretty precarious incident scene that leaves the majority of Firehouse 51 in a building, in a structure fire," co-star Taylor Kinney says. "Dawson is outside, and the majority of us are stuck inside and doing our best to get out."
"It's going to be a harrowing one," Haas says of the call. "It's a dangerous job, and as we've shown on the show, anytime the bells go off, it could be dangerous for anyone. I will say no one's safe on this finale."
Check out the video to see what other hints Kinney and Spencer drop about the Season 5 finale.
Chicago Fire's Season 5 finale airs Tuesday at 10/9c on NBC.
Additional reporting by Alex Zalben