Horizon is a TV show on British national television from BBC4 with an average rating of 3.1 stars by TelevisionCatchUp.co.uk's visitors. We have 133 episodes of Horizon in our archive. The first episode of Horizon was broadcast in September, 2017. Did you miss an episode of Horizon but don't you wan't that to happen in the future? Please set an alarm and add Horizon to your favourites, so we can remind you by email when there's a new episode available to watch. For free!