Special Guest Stars Kate Walsh as Dr. Addison Forbes Montgomery Guest Stars Jaicy Elliot as Dr. Taryn Helm Debbie Allen as Dr. Catherine Avery Alex Landi as Dr. Nico Kim Stefania Spampinato as Dr. Carina DeLuca Abigail Spencer as Dr. Megan Hunt Nikhil Shukla as Dr. Reza Khan Robert I. Mesa as Dr. James Chee Johnny Rey Diaz as Noah Young Meryl Hathaway as Tovah Freedman Derek Mio as Dustin Michael Bowen as Roy Davis Michelle Meredith as Niki Co Starring Sylvia Kwan as Dr. Mabel Tseng Zaiver Sinnett as Dr. Zander Perez Bardia Seiri as Farouk Shami Thad Turner as Vet