14 Fan-Favorite TV Characters Who Were Never Supposed To Have Major Roles

List Rules
Vote up the characters who earned their arcs.

The world of entertainment is fickle. Sometimes we see television stars who were killed off their own shows, while other times we see one-off TV characters promoted to series regulars. Many would be surprised to find out that their favorite television characters of all time started out as a guest actor intended for one episode. But many of those singular appearances have led to long-running characters that became institutions unto themselves.

These small stints becoming massive series arcs all come down to the charisma of the actors playing the characters. Can you imagine Dr. Frasier Crane without Kelsey Grammer portraying him? That character was only meant to be in a handful of episodes, but he eventually became a television institution. There are several shows that have promoted guest stars to series regulars, including South Park, The Office, and Happy Days.