Character mistake: When Hoss takes Timmy for a horseback ride, after they both dismount by the lake, Hoss calls Timmy by his real name Johnny (Whitaker) and not Timmy.
From Agnes - With Love - S5-E20
Character mistake: Using a Texas Instruments TI-89 Titanium, the seventeenth root of 9,000,355,126,606 is 5.781163783, which means the first prime number greater is seven.
Dennis' Penny Collection - S2-E14
Character mistake: When Dennis sees Mr. Wilson park his car and put a penny in the parking meter, he asks, "Did you notice the date on it?" Mr. Wilson tells him, "It was 1492." (00:21:15)