Guest Stars Brennan Brown as Dr. Samuel Abrams Ashlei Sharpe Chestnut as Dr. Naomi Howard Conor Perkins as Dr. Zach Hudgins Alet Taylor as Liliana Wapniarski Henderson Wade as Dr. Loren Johnson Daniel Dorr as Robert "Sully" Sullivan Scott Michael Campbell as Gavin Harley Emily Althaus as Jeanine Curtis Jesse Luken as Seth Curtis Chloe Rena Jackson as Zoey Co Starring Lorena Diaz as Nurse Doris Marie Tredway as Nurse Trinidad "Trini" Campos Jeremy Shouldis as Dr. Marty Peterson Lynnette Li as Nurse Nancy Michael Vaughn Shaw as X-Ray Tech Mike Sarah Brooks as Paramedic Juliette Matthew Isler as Paramedic Matt Sutton Elena Marisa Flores as Officer Rosado Tiff Abreu as Cassidy Beth Johnson as Scrub Nurse Esther Matt Rockwood as Man in Pain Destiny Kaya Sloan as Sister Screen-ager Sarah Ruggles as Paramedic Yvette Cassie Negron as Kelsey Gallicano Luis Antonio Mora as Paramedic Jose Lyric Simone Marseille as Little Girl Seamus Flynn as Ellis Curtis Ben Cumings as Pathology Resident Dale Crystal Claros as Sobbing Family Member William T. Brown as Paramedic Isaac David Abdullah Bittar as Circulating Nurse Warren Penelope Archer as Green Tag Patient Paige Bourne as Lifejacket Woman