Guest Stars Marc Grapey as Peter Kalmick Nate Santana as Dr. James Lanik Ato Essandoh as Dr. Isidore Latham Jesse Lee Soffer as Detective Jay Halstead Arden Cho as Emily Choi Gregory Alan Williams as Bert Goodwin Heather Headley as Gwen Garrett Michel Gill as Robert Haywood Emma Duncan as Dr. Maia Frisch Chloe Csengery as Laura Shane Kenyon as Todd Cronin Sarah Loveland as Marcy Cronin Co Starring Jeremy Shouldis as Dr. Marty Peterson Cesar Jaime as Paramedic Cesar Casey Tutton as Nurse Monique Lawson Mia Park as Nurse Beth Cole Puja Mohindra as Dr. Heather Singh Gail Shapiro as Nurse Belinda Hughes David Parkes as Barry Lindheim Sophie Thatcher as Debra McCormick Birgundi Baker as Kiki Stephen Eugene Walker as Dr. Edwin Krasny Tiffany Renee Johnson as Dr. Alyssa Morrison Kasey Foster as Dina Hastings Alan Cassman as Ralph Ballard (Dark Suit) Jane Baxter Miller as Janice Coveny Javoun Baker as Thomas Michael Rebresh as Walter Zaleski Tom McElroy as Bill Coveny