S4·E11 Play it Again, Stan
Aired January 14, 1989
Synopsis
When Mary and Lester are on their way to the airport their tickets are stolen by a pick pocket who is running from the cops. As Lester and the police officer go after the man Mary waits in the cab and imagines their lives as the movie Casablanca.
In the end, Lester gets the tickets back and they go off to the airport.