Keep track of the films and TV show episodes you have seen. Follow shows and have your own TV calendar, and never forget your favourite TV show episodes.
Bingewatch - See if a series is finished so you can binge watch it
IMDb - Internet Movie Database
SERIST - Your personal TV show tracker
Flixster - Share movie reviews and ratings with friends.
Trakt.tv - Automatically track TV shows & movies you're watching.
Simkl - Simkl is a TV, anime, and movie tracker that keeps a history of all the shows and movies you watch in one, central location. It’s a mobile app, a website, Google Chrome extension to keep track of everything you watch and integrates with many TV apps