First, in Season 1 of How I Met Your Mother, Lily can be seen wearing a wishbone necklace. Then, in Season 6, Zoey is seen with the same necklace after admitting that she bought a bunch of Lily's stuf
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Top 10 TV Continuity Details
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In Game of Thrones, Daenerys mentions that braids represent the number of victories a person has won. As the series continues, you can see that she adds more and more braids.
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#3
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In Parks and Rec, the drunk man Leslie sees on the playground is the same man who returns in the final episode to ask the parks department to fix a playground swing.
