Chicago Fire 3×05 “The Nuclear Option” – Lieutenant Casey (Jesse Spencer) deals with the fallout of his sister Christie’s (guest star Nicole Forester) impending divorce. Meanwhile, Dawson (Monica Raymund) and Mills (Charlie Barnett) settle into their new roles at Station 51. Elsewhere, Brett (Kara Kilmer) can’t decide if she wants to leave Chicago and the Molly’s crew still can’t figure out how to get the food truck started. Taylor Kinney, Eamonn Walker, David Eigenberg, Yuri Sardarov, Joe Minoso and Christian Stolte star. Patrick Flueger, Amy Morton, Randy Flagler and Edwin Hodge guest star.