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.  

Air Date: Wednesday, September 21 (8-9 p.m. ET) on NBC.

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CHICAGO MED -- "How Do You Begin to Count the Losses" Episode 801 -- Pictured: (l-r) Nick Gehlfuss as Will Halstead, Brian Tee as Ethan Choi -- (Photo by: George Burns Jr./NBC)