Box 21 is a TV show on British national television from Channel 4 with an average rating of 4.0 stars by TelevisionCatchUp.co.uk's visitors. We have 1 episodes of Box 21 in our archive. The first episode of Box 21 was broadcast in June, 2021. Did you miss an episode of Box 21 but don't you wan't that to happen in the future? Please set an alarm and add Box 21 to your favourites, so we can remind you by email when there's a new episode available to watch. For free!