You can watch all episodes of vampire diaries easy before it´s on cw, just search it through a FLVDirect player.

Just get any FlvDirect player
ex: link (it´s a free one, supports search on 1600 Streamsites)

1. click on -> search -> video
2. search for "vampire diaries all ep" (it´s online, i searched it a minute ago)
3.select your episode and click on -> watch online or -> download

enjoy

(If you search for a certain episode of a tv show just add "all ep" to name in the search field and you will get all episodes listed)

PS: you can also search for movies,tv shows, musicvideos etc etc