Guest Stars Lorena Diaz as Nurse Doris Devin Kawaoka as Dr. Kai Tanaka-Reed Gregory Alan Williams as Bert Goodwin Ashlei Sharpe Chestnut as Dr. Naomi Howard Luigi Sottile as Sean Archer Alet Taylor as Liliana Wapniarski Henderson Wade as Dr. Loren Johnson John Earl Jelks as Dr. Dennis Washington Daniel Dorr as Robert "Sully" Sullivan Beth Lacke as Dr. Margo Collins Nicolette Robinson as Tara Goodwin Kristof Konrad as Pawel Wapniarski Jeff Kober as Doug Green Tyler Ritter as Derek Walker Savannah Youngblood as Katherine Walker Brad Beyer as Tighe Willis Christopher Mowod as Dustin Norris Co Starring Courtney Rioux as Paramedic Courtney Marie Tredway as Nurse Trinidad "Trini" Campos Lynnette Li as Nurse Nancy Michael Vaughn Shaw as X-Ray Tech Mike Sarah Brooks as Paramedic Juliette Amanda Marcheschi as Nurse Dina Garston Elena Marisa Flores as Officer Rosado Carlos Rogelio Diaz as Nurse Hank Logan Kathleen Czajkowski as X-Ray Tech Kathleen Theresa "Tea" Ro as Nurse Danielle Li Anthony Mannix as Paramedic Harriet Plumpp as Manager Antoine McKay as Ed Cartwright Toni Buena as Reyna Joe Kim as Dr. Cho Jamy Pierrevil as Attendant
