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 Julie Marie Berman Dr. Sam Zanetti Guest Star Gregg Henry Dr. David Downey Guest Star David Eigenberg Christopher Herrmann Guest Star Marc Grapey Peter Kalmick Guest Star Kara Killmer Sylvie Brett Guest Star Jesse Lee Soffer Jay Halstead Guest Star Susie Abromeit Zoe Roth Guest Star Annie Potts Helen Guest Star Lorena Diaz Nurse Doris Guest Star Jeremy Shouldis Dr. Marty Peterson Guest Star Peter Mark Kendall Joey Thomas 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