Hulu is currently letting subscribers know that "Revenge" is scheduled to leave the streaming service in early December. According to a Tweet from the official Hulu Support Twitter account, the rights to "Revenge" will expire shortly, hence its imminent departure from the streaming service.
Fortunately, there are a couple of other methods to stream "Revenge" available online. The easiest way to watch "Revenge" doesn't even require a subscription — all four seasons of the series are on IMDB TV, which is a catalog of movies and TV shows freely available to stream through Amazon with ads shown intermittently throughout. Otherwise, "Revenge" Is available to buy on virtually all major digital storefronts, like iTunes and the Google Play store. So, while fans new and old may soon no longer be able to watch the series through Hulu, "Revenge" will remain accessible online both for free with ads and for purchase.