Continuity mistake: There is a blizzard on Christmas Eve dumping two feet of snow on Milwaukee. Mrs. Cunningham, LaurieBeth and Al are stuck at the Cunningham's house. Near the beginning of the episode, they show an exterior shot before they go inside the house. The driveway for the house is wet looking but totally clear of snow, with no one there to clean it, and it's still snowing. The hardware store has two feet of snow outside of it.
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