Chicago Fire Season 3 Episode 5 Spoilers and Preview: Casey’s Sister’s Impending Divorce Adds Tension To The Firehouse Drama; Brett Has To Choose Whether To Stay Or Leave

By Kara Michelle Oct 17, 2014 09:40 AM EDT

Chicago Fire Season 3 Episode 5 Spoilers and Preview: Casey's Sister's Impending Divorce Adds Tension To The Firehouse Drama; Brett Has To Choose Whether To Stay Or Leave

Chicago Fire Season 3 episode 5 which airs Tuesday, October 21, at the 10 PM time slot on the NBC network is entitled "The Nuclear Option." It will have Lieutenant Matthew Casey (Jesse Spencer) having to deal with the emotional fallout from the impending divorce of his sister Christie's (guest star Nicole Forester). Meanwhile, Gabriela Dawson (Monica Raymund) and Peter Mills (Charlie Barnett) seem to have already settled into their new roles at Station 51.However, Casey's frame of mind at the moment could endanger both himself and his fiancé, the now firefighter candidate Dawson. In particular, it could affect how he will react to an emergency situation when a scorching fire requires him and Gabby to hang from a rope down the side of burning building. In the teaser trailer for the episode, Dawson tells him, "I got a problem. This cable - it's not working." And all he could say back was, "Come on, Gabby. You can do this," even as their team looks up at them with worry. The stuck cable traps them next to a window which burst open as a result of the fire, causing them to swing and sway around helplessly by the side of the burning building.

Elsewhere, Paramedic Sylvie Brett of Ambulance 61 (Kara Kilmer) will have to face an ultimatum in episode 5 which requires her to decide whether she would want to stay in Chicago as Leslie Shay's replacement or to return to her former life. Still elsewhere, the Molly's crew still has to figure out how to get their new food truck business started. The food truck was brought in by Firefighter Rick Newhouse (Edwin Hodge) in exchange for a partnership in the venture with the Molly's II group during this season's episode 3.