Homer and Calvin have a bitter prank war because Abe treats Calvin with the kindness he never showed Homer.
In the subplot, Lisa organizes a massive slumber party at the Retirement Castle to fix her reputation as a "party pooper". [S34E8] Step Brother from the Same Planet
The most distinctive "feature" of the episode is the use of as a communication tool. Homer and Calvin have a bitter prank war
The Simpsons episode " Step Brother from the Same Planet " (S34E8) centers on Homer's intense jealousy when Grampa (Abe) becomes a doting father figure to , the quirky young son of his new girlfriend. To make this theme useful, we can look at the "features" used by the characters to resolve their conflicts: Feature: The "Emotional Taxidermy" Bridge The Simpsons episode " Step Brother from the
Homer enters a taxidermy convention with a crude display—two shells with googly eyes—representing himself and his father.
This visual aid forces Grampa to finally understand Homer's resentment. He admits that he wasn't hard on Homer because Homer was a "bad kid," but because being a father made him feel old, whereas Calvin makes him feel young. Secondary Feature: The "Cool Narc" Slumber Party
She "narks" on her own party by calling the police, but then uses a staged arrest as a social feature.