Guest Stars Alejandro Hernandez as Casey Acosta Debra Monk as Karen Brantley Dierdre Friel as Ella Anna Suzuki as Sandra Fall Ana Villafañe as Dr. Valentina Castro Alison Luff as Alice Healy Austin Pendleton as Eli Pembroke Cole Tristan Murphy as Trey Masterson Co Starring Kim Ramirez as Anesthesiologist Alicia Smith Yvette Ganier as ED Nurse Linda Weber Sarafina King as Paramedic Nokic Jeff Kim as Dr. Alan Kapralien Marissa Matrone as Dr. Margaret Baker Harry Bouvy as Dr. Jay Eliraz Anastacia McCleskey as Dr. Phylicia Elder Lily Du as Dr. Lawan Panyacosit Jenelle Chu as Justine Siefert Kevin Interdonato as Marine Lt. Galatin Sue Jin Song as Dr. Shanai Graceann Dorse as Trey's Mother Joseph Cassese as Trey's Father Melanie Arii Mah as Dr. Brill Natasha Sen as Pediatric Nurse