A kid no one has ever seen before is walking the playground, bringing bad luck and peanut butter wherever he goes. He finally settles on our gang, and they begin having the worst luck of their lives, balls and bats being damaged, injuries, and other indescribable odd fates. The gang thinks about what had made their luck so bad, then they figure it out. The Peanut Butter Kid is a jinx!
They then try to ditch the Peanut Butter Kid, sending him around the playground, the state, and the world. Eventually they confront him, and he then walks away sadly. When the bad luck continues, however, they realize that it was not the Peanut Butter Kid's fault, that they were mean to him for nothing, and mainly, that bad luck cannot be blamed on any one thing. When they try and reconcile with the Peanut Butter Kid, he has met a new group of friends to hang out with. However, as both a sign of forgiveness and to remember him by, the Peanut Butter Kid gives them the remains of his sandwich. They then go back to their old ways, and meet a new girl, who always eats ice cream, they then run for their lives before she can become attached so as not to make the same mistake again.
- Animation/continuity error: Despite having taken several bites out of it, Peanut Butter Kid's sandwich only has one bite in it throughout the episode.
- Animation/audio error: When Spinelli screams after seeing Peanut Butter Kid return from getting Vince's ball, her mouth does not move.
- Animation/continuity error: When some of the gang walks out of Third Street School, Spinelli looks thicker than usual. The same error happens when the gang runs to the Kindergartners' playground.
- Coloring/continuity error: When the gang starts to examine the playground before they immediately run to the Kindergartners' playground-- just to see if the Peanut Butter Kid is not near them, Spinelli's sclera on her eyes is not colored for a frame.
- Animation/continuity error: Spinelli has thick lash lines three times.
- When Spinelli blinks while she says, "Oh, brother."
- When a close-up of Spinelli is shown before Gus gets hit by a kickball.
- When the gang sees Gus being blind.
- Both Peanut Butter Kid and Ice Cream Girl appear in later episodes, but only as background extras.
- Neither Peanut Butter Kid nor Ice Cream Girl ever speaks in the episode; however, they did speak in "King Gus" and "Don't Ask Me", respectively.
- Clips of this episode were used in ABC's "R-E-C-E-S-S" commercial in 1997.
- T.J.'s exclaiming phrase ("Aah! My new ball") is revealed to be the Easter egg of the episode since his scream at the beginning was previously used for Randall's scream in the intro.
- This is the first non-speaking appearance of King Bob.
- This is the second time Gus is seen without his glasses; the first time being "Jinxed".
- The episode's title is a parody of the song, "The Cat Came Back".
- T.J. Detweiler - Ross Malinger
- Vince LaSalle - Rickey D'Shon Collins
- Ashley Spinelli - Pamela Segall-Adlon
- Gretchen Grundler - Ashley Johnson
- Mikey Blumberg - Jason Davis
- Gus Griswald - Courtland Mead
- Ashley Armbruster - Anndi McAfee
- Ashley Boulet - Francesca Smith
- Ashley Quinlan - Rachel Crane
- Chucko/Kid - Ryan O'Donohue