I do not remember this show but this particular scene is stuck in my mind, chafing at what little sanity I have in reserves.
There is this father, who is probably a science guy, who grows a jungle in his lab and concocts an eerie-looking drink, the color of which is evil-green. Then he drinks it in one gulp, I guess and becomes something else. Outwardly, he is human but inside he is a monster. Not like a rapacious lion but rather an evil-doer closely concealing his intentions inside. I think it is his daughter, but she notices the sudden change, for he keeps drinking this concoction more and more everyday (he offers this drink to HER in place of the usual orange juice, no less!) and withdraws himself inside his lab. Then she surreptitiously gains access inside in his absence. She is horror-struck by the weirdness and grossness of everything there, snaky vines everywhere, bubbling sounds haunting her ears.
This lab, for what it is worth, is in their house!
Meanwhile, there is this small group of adolescents, the usual mixture of reckless boys and sheepish girls. They are trying to get inside a haunted mansion (how the lab and the mansion are related is beyond me.)
This is all I can pluck from my brain at the moment. What is this show? I think it is a PBS show or something (definitely not a late-night show) I would really appreciate any sort of input.
*My guess as to how far it goes back is within the range of 10~15 years. *It is very likely that it is a show from the U.S.A.