Which is the longest running series up till now?
What is the longest running series in the history of television?
What are the best TV series of last five years (2008-2013)? What is the best-written TV series ever? Which is the best TV series you have ever watched? What are the best original TV Series ever created so far (2016)? Which is the best TV series currently? What is the longest film that you have watched? What is the best TV series and why? What are the top 10 best TV series of all time? What would be the best ongoing tv series according to you? What is the best TV show that only ran for one season? Which are the best tv series currently showing in the U.S? Why are there only 10 seasons in a tv series? How long does it take to produce an average hour long TV drama episode? What is the best series to watch? When was the golden age of TV? What are the best TV serials to watch? What are the best series to watch? What is the longest running company ever? What is the longest video on Twitch? What is the greatest TV ad in history? Why do American tv-series have those 5-6 month long gaps in the middle of the season? Which is the best TV series you have watched? And why did you like it? What are the best TV series all around the world in 2014? Is Lost the best ever T.V. Series? What are some of the best series from TVF? Which Historical TV series should watch? Which is the best and worst Indian Tv serial? What TV shows had the best series ending?  Which are the best series on tvf play? What is the plural for series?