@Anonymous User assuming you mean entertainment box sets, there a number of options.
Firstly, making sure you're signed in to your device, scroll down and you'll see all the headers down the left hand side - Previews, Movies, Entertainment, Sport and then TV Box Sets.
You can either scroll across and click on the tiles (if the show you're looking for is on one of those) or click on the main header tile and it will take you to the next screen where there's more shows listed.
Alternatively, if you know the name of the show you're looking for, try the search function.
Another option, as you mentioned you can see box sets on another device, is to add the show to 'Watch List' on that device and then head over to your Sony TV where they should be waiting for you!
