Guest Stars Jake Borelli as Dr. Levi Schmitt Chris Carmack as Dr. Atticus "Link" Lincoln Jaicy Elliot as Dr. Taryn Helm Debbie Allen as Dr. Catherine Avery Greg Germann as Dr. Tom Koracick Abigail Spencer as Dr. Megan Hunt Ali Hillis as Lori Carter Greg Winter as Scott Carter Sommer Carbuccia as Caleb Hicks Co Starring Olivia Diane Joseph as Nurse Liv John O'Brien as Lab Tech Jeffrey Christian Ganiere as Gus Carter Enisha Brewster as Anna Williams Judy Jean Berns as Sue Hicks Guiliana Carullo as Alicia Davis Amanda Kubota as Teenager #3 Amina Alzouma as Teenager #1 Kenya Cabilan as Teenager #2 Uncredited Kathy C. An as Nurse Bokhee