The episode tells four tales of famous women featuring Simpsons characters in various roles: Selma as Queen Elizabeth I, Lisa as Snow White, Marge as Lady Macbeth and Maggie as Howard Roark from Ayn Rand's The Fountainhead.
When the wicked queen learns from her magic high-definition television that Snow White is fairer than she is, she dispatches her huntsman (Groundskeeper Willie) to murder the young maiden.
However, Willie the huntsman cannot bring himself to cut out her heart, so Snow White flees into the forest, seeking shelter in the dwarves' cottage.
She keeps house for them while they work in the mines but the wicked queen, disguised as an old woman, physically forces Snow White to eat a poisoned apple.
Still furious over the lack of good reviews on his part, Marge selfishly refuses and orders him to continue his killing spree until he is the only actor left.
In her memory (or rather, by her spirit force, since she apparently has learned nothing from the experience), Homer performs a stirring soliloquy in the empty theater.
A frustrated Marge learns her lesson the hard way when she realizes that she has to spend the rest of eternity with a lazy and happy ghost Homer.
She builds several famous landmarks (such as The Taj Mahal in India and The Bird's Nest in Beijing, China) out of blocks and other toys, all of which are destroyed by Toohey (to the strains of Beethoven's 9th symphony, 2nd movement), who disapproves of the superiority of her creations over those of the other children.
During the trial, Maggie (voiced by Jodie Foster) defends herself by stating that the creative people of her time have never compromised their talent for the sake of others and neither will she.
Years later, Maggie is shown as a successful architect who opens a daycare center dedicated to letting babies express themselves freely.
The longest stretch came near the end, in the form of an extended riff on MacBeth [sic] involving Homer killing a ton of people.
So I guess the question is: How much pleasure is there to milk from seeing familiar yellow people reenact parts of Ayn Rand's The Fountainhead?