When the entire contents of the world's imagination lay open before them, Stan and Kyle step right in. Back in South Park, Cartman swears he's seen a leprechaun.

Stan persuades all the citizens of South Park to buy hybrid cars. A disaster of epic proportions threatens the town and Stan is to blame -- just as everyone starts to feel really good about what they’re doing to help save the earth, scientists discover a stormy, dark mass accumulating over the town.

The town is jolted out of a case of the doldrums when Chef suddenly reappears. While Stan, Kyle, Kenny and Cartman are thrilled to have their old friend back, they notice that something about chef seems different. When Chef's strange behavior starts getting him in trouble, the boys pull out all the stops to save him.

The first Halloween episode starts off with the failure of the Mir Space Station, which crashes right on Kenny. An ambulance comes and takes his body off to the morgue. The boys start to brag about their Halloween costumes. At the morgue, a freak accident involving a bottle of Worcestershire occurs, and next thing you know Kenny is a member of the undead. Kenny breaks free and wanders off into the night.

"Happy Birthday" to Stan's Grandpa Marsh who just turned 102. How does the wizened Mr. Marsh feel about his birthday? He sums it up in five words; "I wish I were dead." and proceeds trying to end his life enlisting Stan to do it for him. However, Stan is aware of a very important thing if he kills his grandfather, he'd be in trouble, and if he's in trouble he can't watch Terrance and Phillip.