What is the longest running TV show?
user
Since the advent of the television, the longest-running prime time US-TV series was M*A*S*H, airing for eleven seasons, 1983 to 1983. Other long-running shows include The Simpsons, spanning twenty seasons, since 1989.
assistant
So, it is the Simpsons?
user
Yes, that’s the correct answer.
assistant
Why do you think they were so successful?
user
The Simpsons is a sitcom that satirizes American culture in a simple and subtle manner.  The writers understood that, as in all art, people often enjoy things if they can relate to them.  To make the series relatable, the writers would exaggerate and extrapolate to the absurd.
assistant
That is a good explanation.
user
Thank you!  In order to answer the question, I consulted the online encyclopedia Wikipedia.
assistant
What is the longest running TV show?
user
Since the advent of the television, the longest-running prime time US-TV series was M*A*S*H, airing for eleven seasons, 1983 to 1983. Other long-running shows include The Simpsons, spanning twenty seasons, since 1989.
assistant
So, it is the Simpsons?
user
Yes, that’s the correct answer.
assistant
Why do you think they were so successful?
user
The Simpsons is a sitcom that satirizes American culture in a simple and subtle manner.  The writers understood that, as in all art, people often enjoy things if they can relate to them.  To make the series relatable, the writers would exaggerate and extrapolate to the absurd.
assistant
That is a good explanation.
user
One thing to note is that long-running series usually have a finite lifespan.  But because the creators and writers continue to produce new stories, you may continue to see new episodes.  One benefit is that you will be able to enjoy new stories that your favorite characters tell, which have not been told before.
assistant
What is the longest running TV show?