Ben 10: Ultimate Alien, Season 1

Gwen Tennyson:
Kevin's been missing for over a week.

Ben Tennyson:
Not missing. He left us. His choice.

Gwen Tennyson:
No, Ben, it's not his fault. He touched the Ultimatrix to save us. It's not his fault the power affected his mind.

Ben Tennyson:
Maybe not, but fair or not, he has to pay the price.

[The Tennyson cousins meet Barry in a hospital room after his encounter with Ultimate Kevin]

Barry:
It was insane. I'm at lunch, right? And this monster shows up and says that it's Kevin Levin. He claims I owe him bucks that I borrowed from him five years ago. So… so I say I don't remember borrowing any money from him, and, well... You can see what happened next.

Gwen Tennyson:
We're really sorry about this, Barry. All of your hospital expenses will be taken care of.

Barry:
So, that was really Kevin? What's wrong with him?

Ben Tennyson:
He's been settling old scores… big ones, small ones. It's all the same to him.

Gwen Tennyson:
He's not well. He didn't mean to hurt you.