Go to "tvmuse.eu" website.
- write The Vampire diaries in search bar.
- Select vampire diaries
- select season 7 then select episode whichever you want to watch
- scroll down a little and under comment section just click on "click here to show" and you will find different links provided by the members. Select any of these and watch.
I hope it will help. You can watch all the tv series on this website free of cost.