Chicago Hope - S5-E9
Visible crew/equipment: At the beginning episode 5.9, "Chicago Hope", the camera and several studio lights reflect on the glass door behind Tim as he sits at the dining room table.
Chicago Hope - S5-E9
Revealing mistake: Tim is at the refrigerator and offers Al a drink. Al says, "Iced tea," and then Tim takes the can out very quickly. It's obvious that Tim Allen already had his hand around the item.
Answer: In seasons 1 and 2, each Binford tool had a unique model number, but from season 3 onward, they were all numbered 6100 as a running gag.
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