Tim Hopper

Izzie faces her past and finds comfort in George, while Alex becomes more attached to Jane Doe (Elizabeth Reaser), Meredith and Derek question their own status, and Cristina resolves to fight for her relationship with Burke -- despite her past with Colin Marlow (Roger Rees).

In the aftermath of Will's apartment fire, Crockett, Ethan and Archer work together to try and save the survivors. Charles and Med's new fellow, Nellie, helps a paranoid patient. Dylan makes a life-changing decision.

Chief Boden turns up the pressure on Severide and Casey to investigate the cause of the fire that trapped his wife; Mouch is over-competitive in the firefighter muster challenge.

When an act of arson harms someone close to the Firehouse 51 family, Severide must track down the perpetrator. Impending budget cuts push Mouch and Pascal to get creative.

Severide is on edge after the arson attack, fearing what might be in store next. Shay and Dawson, meanwhile, plan to party away their problems.

Phillip is reunited with an old flame and the reunion leaves him questioning the nature of his relationship with Elizabeth. Meanwhile, Stan and Nina finally give in to temptation.