Ep 1. The Vengeance of Vilgax, Part 1

As Ben Tennyson grows older, he puts away his Omnitrix and moves on with his life as a normal teenager. However, when he discovers that the alien villain Vilgax is still alive and seeking revenge against him, Ben must once again don the Omnitrix and reunite with his old friends Gwen and Kevin to stop Vilgax's evil plans.

In the season 3 premiere, "The Vengeance of Vilgax, Part 1," Ben, Gwen, and Kevin are on a camping trip in the woods when they are attacked by a group of mysterious robots. The trio manages to fend off the robots thanks to Ben's ability to transform into various alien creatures with the Omnitrix.

But soon, their attention turns to Vilgax as they realize he is behind the robots attacking them. Vilgax reveals that he has allied himself with a powerful alien race known as the Highbreed, and together they plan to take over the universe.

With the help of their old friend Max Tennyson, Ben, Gwen, and Kevin set out to stop Vilgax and the Highbreed. But as they embark on their mission, they encounter a new enemy: a ruthless bounty hunter named SixSix who is also after Vilgax for personal reasons.

As Ben struggles to balance his personal life with his duties as a hero, he must also grapple with the realization that Vilgax is more powerful than ever. With the fate of the universe at stake, Ben and his team must use every tool at their disposal to stop Vilgax's plans and protect the ones they love.

"The Vengeance of Vilgax, Part 1" sets the stage for an action-packed season full of epic battles, personal struggles, and shocking revelations. Fans of the series will be thrilled to see their favorite characters back in action as they fight to save the universe from certain destruction.