Weaver rushes to the aid of her female partner Sandy Lopez when the firefighter is severely injured on the job and must fight for her life. Lewis suffers labor pains and is confined to bed rest, while tension remains between Gallant and Neela as an investigation begins into the suspicious death. Later, Gallant reveals to Neela that he'll be deployed to Iraq. Sam is surprised by the arrival of Alex's dad. Corday discovers that she's the new Head of Surgery.