List of episodes rated 12 by the BBFC

Most episodes are rated PG, but some are given a 12 which brings up the rating of the season box set they're in. The earliest 12-rated episode was Homer Badman (which was originally a PG).

Season 6

 * Homer Badman
 * A Star Is Burns
 * Lisa's Wedding

Season 7

 * The Simpsons 138th Episode Spectacular
 * 22 Short Films About Springfield

Season 8

 * Simpsoncalifragilisticexpiala(Annoyed Grunt)cious
 * Homer vs. the Eighteenth Amendment
 * Grade School Confidential
 * The Canine Mutiny

Season 9

 * The Principal and the Pauper
 * The Cartridge Family
 * Trash of the Titans
 * King of the Hill

Season 10

 * D'oh-in' in the Wind
 * They Saved Lisa's Brain
 * Thirty Minutes Over Tokyo

Season 11

 * Treehouse of Horror X
 * Take My Wife, Sleaze
 * Missionary: Impossible
 * Pygmoelian
 * Bart to the Future
 * Kill the Alligator and Run
 * It's a Mad, Mad, Mad, Mad Marge

Season 12

 * Treehouse of Horror XI
 * Tennis the Menace
 * Trilogy of Error

Season 13

 * The Parent Rap
 * A Hunka Hunka Burns in Love
 * The Blunder Years
 * Brawl in the Family
 * Sweets and Sour Marge
 * Jaws Wired Shut
 * Half-Decent Proposal
 * The Bart Wants What It Wants
 * The Lastest Gun in the West
 * The Old Man and the Key
 * Tales from the Public Domain
 * Weekend at Burnsie's
 * Gump Roast
 * The Sweetest Apu
 * The Frying Game

Season 14

 * Treehouse of Horror XIII
 * How I Spent My Strummer Vacation
 * The Great Louse Detective
 * Special Edna
 * The Strong Arms of the Ma
 * I'm Spelling As Fast As I Can
 * A Star Is Born Again
 * C.E. D'oh
 * 'Scuse Me While I Miss the Sky
 * Three Gays of the Condo

Season 15

 * Treehouse of Horror XIV
 * The President Wore Pearls
 * Today I Am a Clown
 * 'Tis the Fifteenth Season
 * Diatribe of a Mad Housewife
 * Margical History Tour
 * Milhouse Doesn't Live Here Anymore
 * The Ziff Who Came to Dinner
 * Co-Dependent's Day
 * My Big Fat Geek Wedding
 * Catch 'Em If You Can
 * Simple Simpson
 * Bart-Mangled Banner
 * Fraudcast News