More than six years ago, Dr. Sanjay Gupta set out to investigate the science behind medical marijuana. A year later WEED, the first documentary in the award-winning series aired on CNN with an accompanying op-ed penned by Gupta: “Why I Changed my Mind on Weed.” Now, his fifth documentary WEED 5: The CBD Craze, will premiere on Sunday, September 29th 2019 at 8pm ETPT, with Gupta returning to Colorado where he started his journey and introduced viewers for the first time to the word few could even pronounce – Cannabidiol (CBD).