Guest Stars Alejandro Hernandez as Casey Acosta Debra Monk as Karen Brantley Dierdre Friel as Ella Ana Villafañe as Dr. Valentina Castro Ian Duff as Michael Duke J.J. Feild as Dr. Zach Ligon Crystal Dickinson as Tessa Martone Kevin Daniels as Marquis Cannon Kathleen Chalfant as Molly Richards Marcus Callender as Kenny Demi Mills as Harmony Justus Davis Graham as Xander Co Starring Em Grosland as Nurse Kai Brunstetter Stacey Raymond as Paramedic Kerry Whitaker Liba Vaynberg as Nurse April Kosloff Jaimie Linn as Nurse Jaimie Bryson Meltem Gulturk as Nurse Andie Kedrick Brown as Cameron Adam LeFevre as Nathan Laettner Lawrence Evans as Barber 1 Lee Garrett as Damien Chris Lamberth as Lucas G.K. Williams as Rodney Roberson Matthew Shortell as Pablo Alonzo