Roundabout: Part 1 is the one hundred and nineteenth episode of Ben 10.
Forever Knight finally assembles his Round Table of young but super-powerful Knights, including— Ben?! With Ben's help, Forever Knight leads his new minions in an all-out attack on a Particle Accelerator - his true intention to transform it into a Time Machine and conquer history!
Phil works in his garage on something, which appears to fail after an explosion. He then tunes up his laser sword, but soon Max pulls up in the Rustbucket. Max tells Phil that Ben has disapeared, and they can't find him anywhere. Phil has an idea and bring Max and Gwen towards the garage. Phil tells the two that ever since Ben fought Vilgax, he's been tracking the Omnitrix. He found out that the Omnitrix emits a frequency, even when not in use. They find out that he is in Switzerland. The phone rings, and Phil tells an unknown voice that they've found out where Forever Knight is heading.
On Forever Knight's ship, he walks towards a table, where all of his recruits are sitting. He tells them that they are all there because they posses a skill needed to go through with his plan. Kevin for his aliens, Vin for his loyalty, Charmcaster's spells, Billy Billions riches, and Simon's battle suit. Then he calls out his last opertive, Ben. Kevin gets surprised by the presence of Ben. Kevin yells at the Knight telling him that Ben is going to betray them. Kevin asks Ben why should they trust them, and Ben tells them because Max and Gwen don't. Kevin yells out questioning what that means, but Forever Knight silences him, and they continue with their plan.
Gwen: Whoa. Max: Uh, Phil, you're not planning on using that hunk of junk are ya? Phil: Of course not. But it sure brings back some memories, right Max? Gwen: What's he talking about, Grampa? Max: Oh, nothing. He's just messing around.
Phil: Ever since Ben fought Vilgax, I've been tracking the Omnitrix to further study it's abilities. Through my research I've learned that the Omnitrix emits a frequency, even when not in use.
Phil: Okay, we've been tracking Forever Knight's movements over the past few months. Gwen: Who is "we"? Max: Best to just focus on the task at hand Gwen. Phil: With our intel, we came to the conclusion that he was recruiting some sort of team. We weren't sure of the reason why until now. I can say with certainty Ben's in Switzerland because Forever Knight is there at a laboratory in Geneva.