Tom Payne Malcolm Bright Actor Michael Sheen Dr. Martin Whitly Actor Bellamy Young Jessica Whitly Actor Lou Diamond Phillips Gil Arroyo Actor Halston Sage Ainsley Whitly Actor Aurora Perrineau Dani Powell Actor Frank Harts JT Tarmel Actor Keiko Agena Dr. Edrisa Guilfoyle Actor Esau Pritchett Mr. David Guest Star Molly Griggs Eve Blanchard Guest Star Dhruv Uday Singh Vijay Guest Star Evan Hall Pete Guest Star Lanny Joon Cooper Guest Star Young Mazino Alex Guest Star Maureen Sebastian Sheila Guest Star Will Cobbs Grant Guest Star Justine Cotsonas Patti Guest Star Greg Berlanti Executive Producer Sarah Schechter Executive Producer Chris Fedak Executive Producer Sam Sklaver Executive Producer Lee Toland Krieger Executive Producer