Season 2: Episode 33: The Letter
When Marie crashes and ruins her Tupperware party, Debra decides that she's had just about enough of her mother-in-law's constant interference. She takes pen to paper and writes a letter to her mother-in-law, telling her to stop intruding into her life. Horrified by the problems that this letter might trigger, Ray does everything in his power to intercept the offending document--but he fails. Surprisingly, the family discovers that honesty really may be the best policy.