Continuity mistake: When Claudette, Danni, Julien and Wagenbach are at the overturned churro cart crime scene, Claudette is seen pulling a pair of white gloves from her pocket. The gloves then disappear from her hands in a wide shot of her talking to Julien about the crime scene, but reappear in the next shot. (00:16:45)
The Monsters Are on Maple Street - S1-E32
Continuity mistake: During the disturbance, the crystal punch bowl shatters, spilling glass and punch all over the table. Subsequent shots show the punch bowl still intact with no punch spillage.
Continuity mistake: In "Coach" (Season 3, Episode 7), Kate says that Mrs. Krupp's first name is Alice. However, in "CJ's Temptation" (Season 3, Episode 14) CJ says that Mrs. Krupp's first name is Mindy.
Episode #4.2 - S4-E2
Continuity mistake: The ladder carried by a bomber is a plain, ordinary ladder. After he puts it up against a post, it changes to an extendable one made up of three connected ladders.