To Build Or Not To Build - S2-E23
Other mistake: When Randy and Brad complete the magic trick and open up the trunk they are pointing it towards the audience for us to see. But Jill reacts as if she is seeing it too, which, based on where she is sitting and where the trunk is open would be impossible. She would have had to get up and go look or have the trunk turned 90° to make it work. Neither happens.
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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