Main Characters Dr. Polly Grey 17 main appearances Dr. Rob Lake 17 main appearances Mr. Tony Whitman 17 main appearances Dr. Roger Hurley 17 main appearances Sister Donna Rix 17 main appearances Dr. Maya Dutta 16 main appearances Tim Sibley 15 main appearances Hazel Melrose 14 main appearances Paul Tennant 13 main appearances Dottie Sands 12 main appearances