secret central computer that keeps those conditions constant. and there are dozens of scientists regularly tending the plants. this is probably the most tlc for a weed i've ever heard of. >> one would hope so. absolutely. >> dr. jeffrey guy, who runs gw pharmaceuticals says it has to be this way because they're trying to do something no other pharmaceutical company in the world is attempt doing, turning the actual marijuana plant into a prescription drug. >> when you look out at all of this, what comes to your mind? >> i look at this, and i think we can make generations of medicines over the next 25, 30 years. >> medicines for illnesses like alzheimer's, diabetes and ptsd and epilepsy and auto immune diseases like mum pull sclerosis and krohn's. those are the cannabinoids.