Continuity mistake: On the episode dating 22nd January 2010, when Peggy is telling Roxy off for firing Tracey, they are in the kitchen. Roxy then turns to walk downstairs, and her ponytail is high and bouncy. Then, two seconds later, when she is visible again, her ponytail is low and messy.
Continuity mistake: In the episode that aired in the UK on the 10th March, 2004, Harold was almost run over when he was on a walk. The Harold on the road was mostly bald and wasn't wearing glasses. Ian Smith that plays Harold has most of his hair and Harold was wearing his glasses in the next shot.
Witness for the Execution - S2-E15
Continuity mistake: When David and Maddie are debating whether or not to help Lawrence Everett, the towel David uses to wipe shaving cream off his face jumps around during the scene. It's around his neck, then in his hands, then on his shoulder, and back in his hands, etc. (00:15:40)
Continuity mistake: Multiple times throughout the show, Kimber can be seen in quick shots with light pink hair (the same color as Jem's), when her hair color is actually a dark pink/red color. (02:00:00)