Stuart Dooley's mother speaks in the same monotone voice as him. In "Behind Closed Doors," she speaks in a normal tone of voice.
When Peggy takes out the mace Stuart Dooley's jacket disappears, it's back on once she talks about the Spanish Inquisition.
Near the end when Peggy is desperately searching for the paddle Kahn and Minh can be seen walking their dog Doggie who is mistakenly colored brown, his fur is white.
When Peggy pulls out the weapon at the end of the episode she mistakenly refers to it as a mace but in actuality the weapon she's swinging around is flail-class weapon called a Morning Star. Without the chain it would be a mace as she claims.
When the Hills discuss their evening plans while sitting around the kitchen table, Peggy wants the family to watch "Shark Week". This yearly shark related programming block has been a tradition for the Discovery Channel since 1988. Since it's inception, Shark Week has been a summer event, specifically July or August. School would not be in session during this time.