Bart catches Homer toking in "Barthood" (Season 27, Episode 9)
Homer tries medical marijuana in "Weekend at Burnsie's" (Season 13, Episode 16)
Bart finds a "pencil holder" at a flea market in "Homer's Barbershop Quartet" (Season 5, Episode 1)
"Flagrant false advertising," says Otto in "A Milhouse Divided" (Season 8, Episode 6)
Dr. Hibbert offers Homer a skull bong or wizard bong in "Weekend at Burnsie's" (Seasons 13, Episode 16)
Mr. Burns tells hippies, "It was I, you fools! The man you trusted isn't Wavy Gravy at all! And all this time I've been smoking harmless tobacco!" in "Burns' Heir" (Season 5, Episode 18)
Homer at a Phish concert in "Weekend at Burnsie's" (Season 13, Episode 16)
Homer drives stoned (uh-oh...) in "Weekend at Burnsie's" (Season 13, Episode 16)
Marge worries about being an "accessory" to Homer committing a crime in "Weekend at Burnsie's" (Season 13, Episode 16)
Phish fans celebrate in the episode "Weekend at Burnsie's" (Season 13, Episode 16)
Marge gets pressured to hitting a vape pen in "Highway to Well" (Season 31, Episode 17)
Homer starts selling weed in "Highway to Well" (Season 31, Episode 17)
"Cool, yeah, whatever..." says Lisa in "Summer of 4 Ft. 2" (Season 7, Episode 25)
Mayor Quimby growing his secret pot plants in "Sideshow Bob Roberts" (Season 6, Episode 5)