What's the longest TV series ever?

Related questions

1. What is the longest lasting TV show?
2. Which TV series had the most watched finale of all time?
3. Is the office the most popular show on Netflix?
4. What is the average age of Fox News viewers?
5. Is the office available on Netflix?
6. What is longest running TV series?
7. What were the longest running sitcoms?

Tags

1. #longest
2. #scripted
3. #running
4. #began
5. #aired
6. #record
7. #series
8. #episodes
9. #primetime
10. #holds
11. #surpassed
12. #years
13. #gunsmoke
14. #simpsons
15. #currently