Sounds like Corkus was right - except Lisa's telling the tales:
Sounds pretty good - like 22 Short Films About Springfield.LISA TELLS A NEVER-ENDING STORY ON “THE SIMPSONS” SUNDAY, MARCH 12, ON FOX
While cave exploring with his family, Homer causes the cave to crumble and finds himself stuck upside down in the ceiling. Marge and Bart search for help while Lisa passes the time by telling Homer a story, which turns into a chain of narrated tales in THE SIMPSONS episode ”The Seemingly Never-Ending Story” airing Sunday, March 12 (8:00-8:30 PM ET/PT). (SI-1706) (TV-PG D, L, V)
Voice Cast: Dan Castellaneta as Homer Simpson, Mayor Quimby and Groundskeeper Willie, Julie Kavner as Marge Simpson and Patty; Nancy Cartwright as Bart Simpson and Nelson Muntz; Nelson, Ralph and Kearney; Yeardley Smith as Lisa Simpson; Harry Shearer as Kent Brockman, Mr. Burns and Smithers; Pamela Hayden as Milhouse; Hank Azaria as Cletus and Carl.