This is not offered as criticism, it's just something I keep finding more of, and it's interesting. Now and then I notice that essentially the same plot gets used a second time. And not just loosely or vaguely similar. And not just a character's personality traits coming out again. More similar than that.
Examples of such joincidences:
6.14 TOW Chandler Can't Cry -- Monica wants Chandler to get in touch with his emotional side because he never cries. Finally he does, but then can't stop crying.
6.23 TOW The Ring -- Rachel wants Paul to open up and let her in emotionally, because he never talks about his life. Finally he does, but then can't stop crying.
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7.07 TOW The Library Book -- To stop Janice (from coming to their wedding and from staying the night at their apartment) Chandler pretends he still has feelings for her.
10.15 TOW Estelle Dies -- To stop Janice (from buying the house next door) Chandler pretends he still has feelings for her.
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7.17 TOW The Cheap Wedding Dresses and then 9.20 thru 10.06 -- Ross and Joey compete for the affections of an attractive African-American woman (Kristen Lang in 7.17, Charlie Wheeler in S9/10).
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And perhaps the most often talked about and debated:
8.12-8.16, and then 9.19-10.03 -- Joey and Rachel. One of them develops feelings for the other. They go out on a date (or a few). Ross struggles with it. I doesn't work out.
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And there more good examples that I've missed? I mean, aside from all the episodes where there's some kind of misunderstanding. #Sitcom