Guest Stars Boris Kodjoe as Dr. Will Campbell Jillian Murray as Dr. Heather Pinkney Kevin Dunn as Dr. Mark Taylor Tommy Dewey as Dr. Mike Leighton Jeff Hephner as Dr. Edward Harbert Meagan Good as Dr. Grace Adams Paula Newsome as Margaret Wesley Gonzalo Menendez as Secret Service Agent Robert Curtis Brown as Senator Darren Stringer Alex McKenna as Caroline Stringer Kate McNeil as Anne Stringer Co Starring Angela Relucio as Nurse Risa Park Ellia English as Isabel Mendez Emily Nelson as Hannah Reynolds Terrence Edwards as Medic #1 Lyn Alicia Henderson as Medic #1 Joshua Keller Katz as Medic #3 Nikki Tuazon as Scrub Nurse Nathan Anderson as Agent Matt Terry Savage as Agent Hugh Allel Aimiche as Jose Caron Khaled Khalaf as Anesthesiologist