Hidden commentary
Insert Disc 3. Select the "Marge vs. The Monorail" episode. Press [Audio Change] to hear two different sets of commentaries.
Alternately, insert Disc 3. Select the "Marge vs. The Monorail" episode. Enter the "Extras" screen, then press "150" (for example, press "1" then press "+10" until the value "50" is reached). A hidden microphone will appear. Press [Enter] to hear the hidden commentary.
Pre-production sketches
Insert Disc 3. Select the "Homer's Triple Bypass" episode. Enter the "Extras" screen, then press "240" (for example, press "2" then press "+10" until the value "40" is reached). A hidden pencil will appear. Press [Enter] to view several sketches from the episode.
Insert Disc 4. Select the "Krusty Gets Kancelled" episode. Enter the "Extras" screen, then press "35". A hidden pencil will appear. Press [Enter] to view several sketches from the episode.