Three’s Company, “Days of Beer and Weed” (S2E22 - YouTube)
Never a show to shy away from recycling a used plot, Three’s Company essentially remade “Fred’s Treasure Garden” in this Suzanne Sommers-era episode (the show was such a ravenous recycler that it returned to the weed well in the Season 7 episode “Going to Pot”). In this iteration, Jack Tripper and the gang are railroaded into clearing out Mr. Roper’s garden, only to discover that the wild flowers they picked are actually cannabis. While Jack makes an ill-considered attempt to turn the pot leaves over to the police, Mrs. Roper unwittingly grabs some for her flower-arranging class. Unfortunately, this is a bit of a dud episode, with distinctly low stakes and very little of the show’s trademark horndog innuendo.