Zachary Quinto Dr. Oliver Wolf Actor Tamberla Perry Dr. Carol Pierce Actor Ashleigh LaThrop Dr. Ericka Kinney Actor Alex MacNicoll Dr. Van Markus Actor Aury Krebs Dr. Dana Dang Actor Spence Moore II Dr. Jacob Nash Actor Teddy Sears Dr. Josh Nichols Actor Donna Murphy Dr. Muriel Landon Actor Kate Corbett Rosie Guest Star John Thomas Gauthier Billy Guest Star Rainbow Sun Francks Morris Guest Star Dorrett White Nurse Carter Guest Star Kiki Hammill Maya Guest Star Mishel Prada Katie Rodriguez Guest Star Nava Mau Denise Guest Star Nia Cummins Sheila Guest Star Travis Nelson Brad Guest Star Emmanuel McCord Dominic Guest Star Elias Zarou Santino Guest Star Ryan Bommarito Joey Guest Star Kalen Gibbons College Bro Guest Star Michael Grassi Executive Producer Greg Berlanti Executive Producer Sarah Schechter Executive Producer Leigh London Redman Executive Producer Lee Toland Krieger Executive Producer DeMane Davis Executive Producer Melissa Aouate Executive Producer Henrik Bastin Executive Producer Andy Serkis Executive Producer Jonathan Cavendish Executive Producer Will Tennant Executive Producer Michael Goi Director Daniela Lamas Writer Will Ewing Writer