01/19/2013 (09:00PM - 10:00PM) (Saturday) : THE FIREHOUSE STRUGGLES WITH DARDEN'S DEATH - Severide (Taylor Kinney) is hiding a serious shoulder injury sustained in the fire that killed Andy Darden, and grapples with his guilt as he fights to rescue a construction worker trapped in a building collapse. Adding to the burden, Darden's wife Heather (guest star Chaon Cross) turns on Severide at the annual firefighters' barbecue, blaming him for her husband's death. A call is made to an accident site at Hancock Tower, where two teenagers are pinned in a vehicle trapped beneath the falling debris of a broken window washer's cart. Meanwhile, Casey (Jesse Spencer) and Hallie (Teri Reeves) work to figure out their future together. Monica Raymund, Lauren German, David Eigenberg, Charlie Barnett and Eamonn Walker also star.