Main Characters Dr. Kay 'Kayo' O'Brien 13 main appearances Dr. Mark Doyle 13 main appearances Doctor Robert Moffitt 13 main appearances Dr. Josef Wallach 13 main appearances Dr. Michael Kwan 13 main appearances Rosa Villanueva, RN 13 main appearances Dr. Cliff Margolis 13 main appearances
Recurring Guest Characters Zelda 1 guest appearances Dinah 1 guest appearances Kevin 1 guest appearances Nurse 1 guest appearances ⇤ « 1 2 3 » ⇥