Season 8, Episode 4: "The Little Kicks"

It's George. I bet you this is somehow George-related.

- Oh, what are you talking about? - He's like a virus.

He attaches himself to a healthy host company...

...and the next thing you know, the entire staff is infected.

Now you're talking crazy.

All right. Then, Jerry, if that's not what it is, you tell me. What is it?