@MAT13 wrote:
For live-action TV shows (English or foreign), episodes usually have fixed opening where main cast is listed. In English shows that don't have such openings, they usually start listing main cast as the episode starts, before writer and director, and always separate guest cast by adding "Guest Cast" and then list guest. In the end credits these all may appear again grouped, but intro or beginning of the show always somehow lists main cast. Anyone that appears in the end credits only along with main cast under generic "Cast" or just being listed is usually guest cast. I can't think of a live-action show that didn't list main cast at the beginning.Anime are exception since they always list all cast in the end credits.
I understand what you are saying but I don't think the actors who appear week after week would like to be called "Guest cast". Any characters appearing at the beginning merely indicates that they are starring roles of higher importance above the rest of the "main" cast. To list anyone else as "guest cast" suggests a temporary status not the more permanent status of a regular cast member.

