The Vampire Diaries isn't a television series.
The CW Television Network ( commonly referred to as just The CW ) is an American English language broadcast television network that is operated by The CW Network , LLC , a limited liability joint venture between CBS Corporation , the former owners of the United Paramount Network ( UPN ) , and the Warner Bros. . 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 pilot episode attracted the largest audience for The CW of any series premiere since the network began in 2006 .