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 Night Nurse 1 guest appearances Sam 1 guest appearances Mrs. Bender 1 guest appearances David Kerwin 1 guest appearances Dr. Sarah McDonovan 1 guest appearances Sid North 1 guest appearances Graciella Vasquez 1 guest appearances Psychiatrist 1 guest appearances Chris Milner 1 guest appearances Cohen 1 guest appearances Mrs. Goreki 1 guest appearances Vera Amaro 1 guest appearances Santino Amaro 1 guest appearances Carl Stark 1 guest appearances Bert Hammond 1 guest appearances Billie 1 guest appearances Lindsay 1 guest appearances Joey 1 guest appearances Paula 1 guest appearances Dr. Garth 1 guest appearances ⇤ « 1 2 3 » ⇥