Start at "Behind-the-mystery Mystery" for instructions and the first clue. Then, go to the "Special Features" screen, then press Right, Enter. Go to "Additional Special Features" screen, then press Right, Enter. Go to "Scene Selections" screen, then highlight the "Main Menu" or "Good Night, Black Knight" options and press Right, Enter. Enter the "Scene Selections" screen, then highlight the "Main Menu" or "Shifting Gears" options and press Right, Enter. Enter the "Scene Selections" screen, then highlight the "Main Menu" or "End Credits" options and press Right, Enter. Enter the "Languages" screen, then highlight "Francais" under "Spoken Languages", and press Right, Enter. You will find the Prop Guy and Seth Green with the missing pants.