Episodes of "The Vampire Diaries" can be viewed legally on various online streaming sites, including Hulu, Netflix and Amazon, as of 2015. The most recent episodes of the CW television series can also be viewed at the CW's official website. The CW website offers the most recent episodes to viewers for free, but past seasons must be viewed by purchasing a membership to one of the other online streaming services.
Amazon offers episodes of "The Vampire Diaries" or entire seasons available for streaming through its Amazon Instant Video service, and prices range from $1.99 an episode to up to approximately $40 for a whole season.
Hulu offers episodes, behind the scenes footage and clips to viewers, but the most recent episodes are only available to those with a subscription to Hulu Plus. The episodes are also normally only available for a limited time frame, and the Hulu uploads depend on the broadcasting channel's schedule. Interested viewers who do not already have a Hulu Plus subscription can take advantage of the free trial period.
The most recent episodes of "The Vampire Diaries" are posted for free on the CW website the day after they air. The site features the five most recent episodes as well as various bonus materials such as cast interviews and trailers for upcoming episodes.