Believe it is the Uktv app that you need has Drama and some other catch up channels on it that are on freeview. If you have BT tv iit is on there if not you can find it in the Apple Store or whatever tablet you use
Some, but not all, programmes on Drama are available on 'catch up' via UKTV Play. It's available via their website here:
http://uktvplay.uktv.co.uk/
It's also available via apps for iOS devices (iPad/iPhone) and Android ones (phone & tablets) as well as via Virgin Media and YouView but not via Sky platforms (such as satellite or Now TV services)