*''Homer's Phobia'': Homer criticizes gay-marriage, but in the end he changes his mind.
*''Homer's Phobia'': Homer criticizes gay-marriage, but in the end he changes his mind.
*''The Old Man and the Lisa'': Promotes [[Environmentalism]].
*''The Old Man and the Lisa'': Promotes [[Environmentalism]].
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*''Mother Simpson'': Treats the hippie movement and the decadence of the sixties in a positive and sympathetic manner relating to the titular character, Mona Simpson.
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*''D'oh-in' in the Wind'': Again, promotes the hippie movement in a positive manner.
*''There's Something About Marrying'': Marge supports gay marriage.
*''There's Something About Marrying'': Marge supports gay marriage.
*''The Monkey Suit'': Lisa opposes teaching of [[Intelligent Design]] in schools. (Although at the end of episode Lisa acknowledges to respect exercising Creationism in church.)
*''The Monkey Suit'': Lisa opposes teaching of [[Intelligent Design]] in schools. (Although at the end of episode Lisa acknowledges to respect exercising Creationism in church.)