He's Too Sexy for His Fat - S2-E17
Continuity mistake: Lois hands Chris a plate of steamed vegetables at the dinner table, and he's holding a fork and knife. Just before she says, "Oh honey, it's good for you," Chris sets the fork down and has the knife lifted in the air. Then, in the next shot, suddenly the knife is on the table and he's using the fork on the food. Also, Lois goes from having her hand on his shoulder to her arms at her sides. (00:08:45)