query: When did the TV series The Vampire Diaries first air?
passage: The Vampire Diaries
The Vampire Diaries is an American supernatural drama television series developed by Kevin Williamson and Julie Plec, based on the popular book series of the same name written by L. J. Smith. The series premiered on The CW on September 10, 2009, and concluded on March 10, 2017, airing 171 episodes over eight seasons.
passage: The Vampire Diaries (season 7)
"The Vampire Diaries", a one-hour American supernatural drama, was renewed for a seventh season by The CW on January 11, 2015, and premiered on October 8, 2015. On March 11, 2016, The CW renewed "The Vampire Diaries" for an eighth season, which was confirmed to be the final one on July 2016. This season represents a soft-reboot for the series, with the exits of Nina Dobrev, Michael Trevino and Steven R. McQueen.