Oliver Platt Dr. Daniel Charles Actor S. Epatha Merkerson Sharon Goodwin Actor Nick Gehlfuss Dr. Will Halstead Actor Yaya DaCosta Nurse April Sexton Actor Colin Donnell Connor Rhodes Actor Torrey DeVitto Dr. Natalie Manning Actor Brian Tee Dr. Ethan Choi Actor Rachel DiPillo Sarah Reese Actor Marlyne Barrett Maggie Lockwood Guest Star David Eigenberg Christopher Herrmann Guest Star Kara Killmer Sylvie Brett Guest Star Jesse Lee Soffer Jay Halstead Guest Star Frank Frankson Joel Donahue Guest Star Marika Engelhardt Beth Donahue Guest Star Audrey Francis Margie Cavanaugh Guest Star Maria Rivera Mariana Acosta Guest Star Adam Farabee Jamie Delson Guest Star Dick Wolf Executive Producer Matt Olmstead Executive Producer Michael Brandt Executive Producer Derek Haas Executive Producer Danielle Gelber Executive Producer Peter Jankowski Executive Producer Joe Chappelle Executive Producer