Defining television one rerun at a time. Welcome to MsMojo, and today we’re counting down our picks for the most impactful and memorable liveaction TV episodes that aired before 2000. Our countdown includes "Dallas," "Cheers," "Seinfeld," and more! What classic episode do YOU think changed the game? Let us know in the comments!

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MsMojo is a leading producer of reference online video content of Top 10 Lists, Origins, Biographies, Commentary and more on Pop Culture, Celebrity, Movies, Music, TV, Film, Video Games, Politics, News, Comics, Superheroes. Your trusted authority on ranking Pop Culture.

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