After being healed from injuries sustained in the pilot episode, grows tired of his drones' failures and decides to capture the Omnitrix himself. He begins a massive assault on Earth, forcing the Tennyson family into a direct confrontation.

Depending on which Ben 10 series you are referring to, the 13th episode of the first season varies:

" Secrets " is widely considered a "peak" episode of the classic series by fans on Reddit because it successfully transitions the show from a monster-of-the-week format to a larger, more complex narrative. It establishes Vilgax as a "universal threat" and deepens the lore of the Omnitrix and the Plumbers.