|"When To Let Go"|
|Season 4, Episode 02|
|Air date||October 3, 2018|
|Written by||Diane Frolov, Andrew Schneider & Danny Weiss|
|Directed by||Charles S. Carroll|
"Be My Better Half"
"Heavy Is The Head"
In the second part of the three-show, one-night crossover event, the doctors and nurses of Chicago Med find themselves on high alert when an overflow of patients are rushed into the doors following a terrifying apartment complex blaze. Dr. Rhodes fights to save the life of one of "Chicago Fire's" own, while Dr. Halstead and his brother Jay struggle with their own personal battle.