Ted: By the way, what happened to the janitor they hired to replace you?
[flashback: The Janitor is dressed in a white lab coat and is seated at a desk as he talks to a man:]
Janitor: We're going to have to let you go, Marv. But, stiff upper lip.
Marv: I'm sorry, Dr. Itor.
Janitor: Call me Jan.
[present:]
Janitor: I heard he quit.