Dr. Charles grapples with his own mental health after working the suicide prevention line on Chicago Med’s April 1 return episode “The Book of Charles.”

The episode places Dr. Daniel Charles (Oliver Platt) front and center in two compelling episodes, with the second hour “Altered States” airing Wednesday, April 8.

First look photos from “The Book of Charles” airing Wednesday, April 1 (08:00PM – 09:00PM) on NBC.

NUP_209593_01449.jpg

Picture 1 of 6

CHICAGO MED -- "The Book of Charles" Episode 1115 -- Pictured: Darren Barnet as Dr. John Frost -- (Photo by: George Burns Jr/NBC)