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 Dr. Connor Rhodes Actor Brian Tee Dr. Ethan Choi Actor Torrey DeVitto Dr. Natalie Manning Actor Rachel DiPillo Dr. Sarah Reese Actor Michael Hendricks Lou Conte Guest Star Regan Rohde Carol Conte Guest Star Annie Potts Helen Guest Star Marlyne Barrett Maggie Lockwood Guest Star Julie Marie Berman Dr. Sam Zanetti Guest Star Norm Lewis Bobby Guest Star Scott Subiono Walter Blevins Guest Star Marc Grapey Peter Kalmick Guest Star Samrat Chakrabarti Dr. Farinas Guest Star Jesse Lee Soffer Jay Halstead Guest Star Brian Geraghty Sean Roman Guest Star Ilyssa Fradin Kathleen Pierce Guest Star Lorena Diaz Nurse Doris Guest Star Jeremy Shouldis Dr. Marty Peterson 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