Yes, please go to the Channel Info page, tap the "filter" button under "COMMENTS" and choose "unplayed". You could also filter "downloaded" episodes. This feature is available both in the Android and iOS versions.

If you are an Android user, you could also set to remember the filter for a channel. Please tap the "more" button (three vertical dots) on the top right corner of Channel Info page - Settings - and enable "Remember the filter settings", as shown in picture 2.

This "filter" function is also available for Downloads, Playlist and New Episodes sections so that you could feel free to filter "unplayed" or "downloaded" episodes.