When Springfield legalized gambling, Robert Goulet guest starred as himself, set to perform at Mr. Burns' casino until Bart tricks him into performing at his tree house.

The Simpsons Season 5 Episode 10 Quotes

Homer: (Wearing glasses) The sum of the square roots of any two sides of an isosceles triangle is equal to the square root of the remaining side!
Man: (From inside a bathroom stall.) That's a right triangle, you idiot!
Homer: D'oh!

Homer: Marge, I want you to admit you have a gambling problem.
Marge: You know, you're right, Homer. Maybe I should get some professional help.
Homer: No, no, that's too expensive. Just don't do it anymore.