Frasier treats a woman who has a phobia about clowns. He plans to don a clown costume and full make-up as part of her treatment. Martin sneaks into Frasier's office and scares him by coming up behind him with one of Frasier's masks over his face. Frasier does not find this amusing, so Martin repeatedly teases him about being a "fuddy-duddy." Frasier decides to retaliate for the prank.