Special Guest Stars Debra Monk as Karen Brantley Guest Stars Alejandro Hernandez as Casey Acosta Matthew Jeffers as Dr. Mark Walsh Megan Byrne as Gladys Miller Mike Doyle as Martin McIntyre Conner Marx as Ben Meyer Christine Chang as Dr. Agnes Kao John Earl Jelks as Horace Reynolds Kathryn Prescott as Vanessa Bloom Daniel Dae Kim as Dr. Cassian Shin Toya Turner as Gabrielle Morris Leslie Uggams as Mama Reynolds Jasmine Batchelor as Courtney Max Malas as Young Iggy (1992) Molly Griggs as Dr. Luna Goodwin Alina Volobuyeva as Yulia Salenko Alona Jane Robbins as Young Wilder (1998) Co Starring Opal Clow as Luna Nora Clow as Luna Stacey Raymond as Paramedic Kerry Whitaker Kim Ramirez as Anesthesiologist Alicia Smith Isaiah Seward as Paramedic Durango LaRae Muscat as Sameera Renee Ternier as Nurse Devers Delaney Quinn as Harper Nirvaan Pal as Saleem Lawrence Oliver Cherry as Deacon Earnest Alyssa Keegan as Neurosurgeon Dr. Aly Gaffen Katrina Nelson as ASL Interpreter Tessa Hope Slovis as Kate Blake Kane as Five-Year-Old Boy (1988) Roman Engel as Dimi Salenko Corbin Drew Ross as Toby (1992) Adam Blackstone Jr. as Young Floyd (1989) Eliza Donaghy as Mean Girl (1998) Joan Almedilla as Nurse Alonto Daniel Rios Jr. as Security Guard Bart Hudson Paul as Adam (1998) Michael Bonini as Peter (2008) Christian Calloway as Homeless Man (2008) Jasmine Rush as Mama Nola (1989) Nick Kohn as Iggy's Father (1992) Angelita Esperanza as Nurse Dalisay Aizzah Fatima as Doctor (1988) Porter Kelly as Iggy's Mother (1992)