Special Guest Stars Taylor Kinney as Lieutenant Kelly Severide Christian Stolte as Lieutenant Randy "Mouch" McHolland Oliver Platt as Dr. Daniel Charles S. Epatha Merkerson as Chief Administrator Sharon Goodwin Miranda Rae Mayo as Firefighter Stella Kidd Dermot Mulroney as Battalion Chief Dom Pascal Steven Weber as Dr. Dean Archer Luke Mitchell as Dr. Mitch Ripley Sarah Ramos as Dr. Caitlin Lenox David Eigenberg as Captain Christopher Herrmann Darren Barnet as Dr. John Frost Guest Stars Nate Corddry as Thomas Milken Jason Kelley as Cory Ian Foreman as Jacob Antonella Rose as Ellie Simshaw Danny Fischer as Duffy Chloe Jo Rountree as Becca Nick Fondulis as David Mossberg Erik Odom as Marcus Jennifer Regan as Lauren Bates Co Starring Nathan Reid as Justin Simshaw Charles Stransky as Cy Raquel Davies as Esme Justin Mane as Ray Gorman Catherine Collier as Suited Woman (AKA Meg) Aila Peck as Jane Doe / Margaret Simshaw Colin Sphar as Scott Erica Lynn Castillo as Paramedic
