According to this wiki page, several series have had fewer than eight seasons.
Here is the list of 60 TV series that have had fewer than eight seasons:
- 30 Rock
- Adam-12
- Agents of S.H.I.E.L.D.
- Arrested Development
- Battlestar Galactica
- Boy Meets World
- Breaking Bad
- Buffy the Vampire Slayer
- Cagney & Lacey
- Cheyenne
- Chicago Med
- Cold Case
- Designing Women
- Downton Abbey
- Elementary
- Empty Nest
- Family Ties
- Fantasy Island
- Friday Night Lights
- Futurama
- Gilmore Girls
- Growing Pains
- Hill Street Blues
- Homicide: Life on the Street
- Hunter
- In Living Color
- In the Heat of the Night
- Just Shoot Me!
- Legends of Tomorrow
- Lost
- MacGyver
- Mad Men
- Malcolm in the Middle
- Marcus Welby, M.D.
- Medical Center
- Melrose Place
- Mission: Impossible
- NCIS: New Orleans
- Once Upon a Time
- Parks and Recreation
- Petticoat Junction
- Rules of Engagement
- Sabrina, the Teenage Witch
- Scandal
- Star Trek: Voyager
- Step by Step
- Stranger Things
- The Dukes of Hazzard
- The Golden Girls
- The Golden Girls
- The Good Wife
- The Mary Tyler Moore Show
- The Mentalist
- The Muppet Show
- The Sopranos
- The Twilight Zone
- The West Wing
- The Wire
- Twin Peaks
- Without a Trace
