The Call of the Simpsons

The Call of the Simpsons is the seventh episode of The Simpsons' first season. It first aired on February 18, 1990.

Plot
Homer, envious of Ned Flanders' new motor home, goes to Bob's RV Round-up to buy one of his own, but because of his poor credit rating, he only qualifies for a dilapidated one. Thrilled with the new RV, Homer takes his family on an excursion. Driving on remote back roads, the Simpsons find themselves teetering over a precipice. The family escapes the RV before it plummets over the cliff, only to find themselves stranded in the wilderness.

Homer and Bart set out for help, unaware that Maggie is tagging along, while Marge and Lisa stay behind. Separated from Homer and Bart, Maggie is soon adopted by a family of bears. Meanwhile, Homer and Bart are plummet into a raging river where they remove their clothes, only to cover themselves with leaves and mud. Marge and Lisa make themselves comfortable by a campfire, while the boys freeze in the wilderness. The next day, Homer is attacked by bees and escapes them by jumping into a mud pit. A nature photographer takes a picture of Homer, mistaking him for Bigfoot, and soon the forest is inundated with Bigfoot enthusiasts and reward seekers.

Marge, having been rescued along with Lisa by park rangers, identifies the monster in question as her husband. Cold, hungry, and exhausted, Homer and Bart stumble upon the cave housing Maggie and the bears. Homer is soon captured and taken to a lab for testing. The authorities allow Homer to return home after determining he is either a below-average human being or a brilliant beast.

Chalkboard gag
"I will not draw naked ladies in class"