Hi @Anonymous User
Hopefully you are not referring to Sky Store, where each movie is a rental or purchase and not part of your NOW Cinema Membership.
To find what movies are on NOW, open the NOW App and from the NOW Home Screen Page navigate to the tile box that says "View All Movies" highlight and click on it.
Then a secondary page will open with different movie sections such has "Recently Added" for example.
The above method is similar on most devices (apart from using the internet browser on the NOW website).
There is a couple of new films coming in December to NOW Cinema.