Quote from Kramer in The Limo
Kramer: [claps] Maybe he's with the company. Elaine: What? Kramer: The CIA! Maybe they placed him in there to infiltrate the organization from within. Elaine: What about his comedy act? Kramer: That's the perfect cover! All that time on the road? Look, Jerry, he's too normal to be a comedian. These comedians, they're sick, neurotic people. Elaine: Well, what about George? Kramer: What about him, he's part of it. His whole personality is a disguise. No real person can act the way he does. Elaine, I'm telling you they're with the organization. They're all part of it. He's in there with Helms and Hunt and Liddy, that whole crowd. George and Jerry, they probably know who killed Kennedy!