An update today brought playlist support and continuous playback when you start an episode from On Deck.
Rather than coming back every 22 minutes to start a new episode.
you might create custom playlists, which will be saved even when you leave the app.
The update is available for the Android and Android TV interfaces of Plex right now.
Plex for Android| Google Play Store viaAndroid Police
Plex for Plex Pass| Google Play Store