On the episode menus for one or two episodes on each disc, if a red button is seen on the video projector, select it and you will get a secret deleted scene from that episode. These episodes are:
* "You Only Move Twice"
* "The Twisted World of Marge Simpson"
* "Mountain of Madness"
* "The Itchy & Scratchy & Poochie Show"
* "The Old Man and the Lisa"
* "Homer's Enemy"