The show I Dream Of Jeannie produced 139 episodes (109 were in color and 30 black and white).
For years the main characters have remained in the story. Others came and went sometimes for short periods and sometimes for many episodes.
They helped to make the story more exciting.
Some of the main chracters were Jeannie, Major Anthony "Tony" Nelson and Major Roger Healey
Each episode was a story on its own but it formed part of the whole story.