Overview:Horizon takes a look at the history of cannabis and the research on the effects of smoking marijuana.
Watch Trailer
First Air Date: Feb 04, 1964Last Air date: Jul 14, 2022Season: 59 SeasonEpisode: 1161 EpisodeRuntime: 60:14 minutesQuality: HDIMDb: 3.611 / 10 by 27 usersPopularity: 167.664Language: en
Comment