- Seasons: 19
- Episodes: 420+ (Ongoing)
Similar to Law & Order, NCIS combines the perfect amount of drama with crime to make for an entertaining series. Across over 400 episodes, the show centres around special agents from the Naval Criminal Investigative Service as they deal with day-to-day crime cases. Due to its popularity, NCIS now has several spinoff series, including NCIS: Los Angeles, NCIS: New Orleans, and NCIS: Hawaii.