And Then There Were 10 is the first episode of Ben 10.


Ben Tennyson starts his summer trip with his cousin Gwen Tennyson and Grandfather, Max Tennyson.

Character debutsEdit

Omnitrix Alien DebutsEdit



  • Vilgax
  • Vilgax's Drones

Aliens UsedEdit


Major EventsEdit

  • The Omnitrix crash lands on Earth and locks onto Ben Tennyson's wrist.
  • Vilgax starts hunting Ben Tennyson to take the Omnitrix.
  • Vilgax is injured during a space battle with Xylene and has to have his body restored during his search for the Omnitrix.
  • Ben first transforms into Heatblast, Wildmutt, Diamondhead and XLR8.


  • Grandpa Max recognizes Heatblast as an alien. He tries to cover up his knowledge by saying that it's obvious. This was the first of several references to his knowledge about aliens that led to his secret being revealed in Truth.


  • This is the only episode in the Ben 10 franchise that does not have the opening theme.
  • The events of the episode are referenced in the pop-up version of Washington B.C. and are stated that a news report of the episode's events are what inspired Dr. Animo to complete his mutation research.

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