Cheers, Season 11

[The series' last lines]

Norm:
Sammy, can I let you in on a little secret?

Sam:
Sure.

Norm:
I knew you'd come back.

Sam:
You did?

Norm:
You can never be unfaithful to your one true love. You always come back to her.

Sam:
Who is that?

Norm:
Think about it, Sam.

[Norm leaves. Sam considers this, then figures out what he meant.]

Sam:
Boy, I tell ya, I'm the luckiest son of a bitch on earth. [At he walks back, he hears a man come down the steps and knock on the door.] Sorry, we're closed.

[The man leaves. Sam straightens the picture of Geronimo on the wall, then leaves out the back.]