– 20 episodes Season 2 (2011) – 12 episodes Season 3 (2011–2012) – 20 episodes 📺 4. Ben 10: Omniverse – 2012–2014 Episodes: 80 (8 seasons)
– 13 episodes Season 2 (2009) – 13 episodes Season 3 (2009–2010) – 20 episodes 📺 3. Ben 10: Ultimate Alien – 2010–2012 Episodes: 52 (3 seasons)
– 40 episodes (11 min each; paired as 20 half-hours) Season 2 (2017–2018) – 40 episodes Season 3 (2018–2019) – 52 episodes Season 4 (2019–2021) – 34 episodes
– 13 episodes Season 2 (2006) – 13 episodes Season 3 (2006–2007) – 13 episodes Season 4 (2007–2008) – 13 episodes
Here’s a helpful, organized guide to across the original continuity (2005–2021). This covers every main series, season, and episode count for easy reference. 📺 1. Ben 10 (Original Series) – 2005–2008 Episodes: 52 (4 seasons)
Includes the 2-part finale “Ben 10: Secret of the Omnitrix” (sometimes listed separately). Episodes: 46 (3 seasons)