Revealing mistake: At the very ending of the episode, when Tim runs through the back wooden fence, just before he hits the fence, you can see the loose board fall from top to the bottom and towards him before he even hits the fence.
Home Improvement (1991)
1 revealing mistake in Knee Deep
Tanks For The Memories - S5-E15
Continuity mistake: The boys had different haircuts in the previous episode. Randy had just gotten a haircut, and in this episode, the kids are younger and have their longer hair right back. (00:05:50)
Al: Say, do you think they call it a nail gun because it shoots nails?
More trivia for Home Improvement
Question: Was the actor who played Cal Boreland really Richard Karn's brother in real life?
Answer: According to imdb.com: Richard has only one sister. http://uk.imdb.com/name/nm0439781/bio.
Answer: It should also be noted, Richard Karn is his stage name as Karn is his middle name. His real name is Richard Wilson. Cal was played by Keith Lehman.
Siblings can have different last names. One might have a different father. Maybe one legally changed his name for some reason, or a man took his wife's last name (not as common, but it happens). Of course, these two actors are not actually related, but I just wanted to point this out.
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Answer: No the guy sent in a picture of himself because he thought he looked like Al. So they brought him on the show as his brother.
Bowling255 ★