[s3e19] I Am The Apocalypse -

A patient enters the ER claiming to carry a deadly airborne virus (revealed later as Marburg) and detonates a grenade .

The episode "[S3E19] I Am the Apocalypse" serves as the high-stakes backdoor pilot for Chicago Med . First airing on April 7, 2015, it masterfully transitions from a standard rescue mission to a terrifying medical siege. Plot Summary [S3E19] I Am The Apocalypse

(Laurie Holden): A skilled trauma surgeon. Aftermath & Relationship Beats A patient enters the ER claiming to carry

(Nick Gehlfuss): Jay Halstead’s brother, a brash plastic surgeon. [S3E19] I Am The Apocalypse

Severide survives his surgeries but is shaken by the near-death experience.