Here's a TV show structure that could go on forever: where each season is in effect a different series, with new characters and maybe a new setting. Tim Kring wanted to use this for Heroes
, and Harper's Island
was going have a similar structure (each season a different murder mystery).
It's a sneaky way of having your new series auto-greenlit, by linking it to the series that actually was greenlit. But Heroes'
fate shows why it might not pan out. When a series succeeds, the actors/characters are a big part of the success, so why dump them and screw the whole deal? Sounds like a sweet deal for showrunners but not so much for networks.