Guest Stars Randy Flagler as Firefighter Harold Capp Lauren German as Paramedic Leslie Shay Jon Seda as Detective Antonio Dawson Nick Gehlfuss as Dr. Will Halstead Jesse Lee Soffer as Detective Jay Halstead Patrick John Flueger as Officer Adam Ruzek Yaya DaCosta as Nurse April Sexton Oliver Platt as Dr. Daniel Charles S. Epatha Merkerson as Sharon Goodwin Warren Christie as Firefighter Scott Rice Karen Aldridge as Dr. Kendra Perrington Laurie Holden as Dr. Hannah Tramble Emily Shaffer as Claman Co Starring Anthony Ferraris as Squad 3 Driver Tony Ferraris Jennifer Weigel as Melissa Brosh-McKenna Sarab Kamoo as Noor Mahmoud Ray Frewen as Jim Ada Grey as Ruby Alanna Rogers as Female Patient Andy Nagraj as Aleem Mahmoud Carisa Barreca as Registrar Cayne Collier as Lowe Cole Millette as Melanie Leslie Handelman as Ruby's Mother Paul Dunckel as Factory Supervisor James Rana as Ali Mahmoud Uncredited Anne Lockhart voices Dispatcher