During the scene with Archie planning to defend his coming grandson if anyone thrusts any anti-Polish remarks toward him, Carroll O'Connor pulled a prank on Rob Reiner. After Mike drops his head down, reacting to Archie's hypocritical rant on people being prejudice toward minorities, O'Connor ad-libbed the line "What's the matter, my fly open?", taking Reiner by surprise, struggling to keep a straight face.
Gloria returns from work smelling of perfume which she laments that the Stivics can't afford. In Season 5's "Everybody Does It," Mike calls out her dishonesty for bringing home lipstick samples to which she admits. (Note: Gloria simply sprayed a sample on herself as opposed to bringing home bottles of it as she had on the previous episode).