Hulu

Hulu is a US service that provides a subscription service of on-demand streaming content including TV shows, movies, webisodes and other content.

In october 2011, the CW and Hulu announced a programming deal. Hulu Plus subscribers are able to view the five most recent episodes of Supernatural beginning the day after they air. Users of the free Hulu service will be able to watch five episodes of current season programming beginning eight days after each episode airs on The CW. Source.