The Limo (Season 3, Episode 19)
When arriving back in New York from Chicago, Jerry sees a Limo driver waiting for someone named O’Brien. Jerry realizes that O’Brien didn’t make the flight in Chicago to New York and offers up the idea to George that they take this limo home as O’Brien.
It turns out that O’Brien is the leader of the Aryan movement, and is very much hated. When the limo picks up two people, George pretends to sleep, covering his face so that neither of them are able to see him. Little does he know that they don’t even know what O’Brien looks like, which gets them into a whole lot of trouble.