▁rest ▁of ▁the ▁series , ▁rather ▁than ▁revert ▁to ▁meat - e ating ▁in ▁the ▁next ▁episode . ▁The ▁staff ▁promised ▁that ▁she ▁would ▁remain ▁a ▁veget arian , ▁resulting ▁in ▁one ▁of ▁the ▁few ▁permanent ▁character ▁changes ▁made ▁in ▁the ▁show . ▁McC art ney ' s ▁wife ▁L inda ▁was ▁also ▁rec ru ited ▁to ▁appear ▁in ▁the ▁episode . ▁She ▁told ▁Entertainment ▁Week ly ▁that ▁the ▁episode ▁was ▁a ▁chance ▁for ▁her ▁and ▁her ▁husband ▁" to ▁spread ▁the ▁veget arian ▁word ▁to ▁a ▁wider ▁audience ". ▁Paul ▁and ▁L inda ▁were ▁both ▁long - time ▁fans ▁of ▁The ▁Sim ps ons . ▁ ▁M irk in ▁later ▁said ▁that ▁recording ▁with ▁the ▁McC art ne ys ▁was ▁one ▁of ▁the ▁most ▁" am az ing " ▁experiences ▁of ▁his ▁life . ▁He ▁fle w ▁to ▁London ▁and ▁met ▁the ▁couple ▁at ▁Paul ▁McC art ney ' s ▁recording ▁studio , ▁where ▁the ▁McC art ne ys ▁spent ▁an ▁hour ▁recording ▁their ▁parts . ▁The ▁Sim ps ons ▁cre ator ▁Matt ▁Gro ening ▁was ▁supposed ▁to ▁go ▁with ▁M irk in ▁to ▁London , ▁but ▁missed ▁his ▁plane . ▁Gro ening ▁commented ▁that ▁having ▁McC art ney ▁and ▁the ▁rest ▁of ▁The ▁Beat les ▁on ▁The ▁Sim ps ons ▁" was ▁a ▁dream ▁come ▁true ▁for ▁all ▁of ▁us ". ▁ ▁L inda ▁McC art ney ▁died ▁of ▁cancer ▁at ▁age ▁ 5 6 ▁on ▁April ▁ 1 7 , ▁ 1 9 9 8 . ▁The ▁Sim ps ons