Either the people in charge hated the episode, or circumstances led to the program being shuffled around until it disappeared. Then again, some famous “lost episodes” of a television series aren’t actually lost they were simply shelved by studios for one reason or another. Who knows – even episodes of your favorite television series may have been lost to history. Other lost episodes of popular TV shows like Doctor Who's 'The Power of the Daleks,' are not only known to be real, but are some of the most sought-after pieces of media of all time. Some TV episodes like 'Squidward's Suicide' (from SpongeBob SquarePants) are merely urban legends.
There are some TV show episodes that have been lost or banned outright, and a few may not even exist at all. Thanks to the advent of streaming services, pretty much every episode of a TV show you want to see is out there – almost.