Season One DVD is made up of
DISC ONE: Season One
DISC TWO: First Part Of Season Two
Season Two DVD is made up of:
DISC ONE: Second Part Of Season Two
DISC TWO: Third Part Of Season Two & One Episode Of Season Three
Season Three DVD is made up of:
DISC ONE: First Part Of Season Three
DISC TWO: Second Part Of Season Three
DISC THREE: Third Part Of Season Three - Minus the last episode which is on Season Two DVD
Season Four DVD is made up of:
DISC ONE: First Part Of Season Four
DISC TWO: Second Part Of Season Four
DISC THREE: Third Part Of Season Four
Season Five DVD is made up of:
DISC ONE: Fourth Part Of Season Four
DISC TWO: Fifth Part Of Season Four
DISC THREE: Sixth Part Of Season Four - Minus Final Three Episodes
Family Guy Presents: Stewie Griffin: The Untold Story
DISC CONTAINS: The Final Three episodes of Season Four, which are not on the season five DVD, and are here merged, with bonus material, into an eighty minute movie.
Season Six DVD is made up of:
DISC ONE: First Part of Season Five
DISC TWO: Second Part Of Season Five
DISC THREE: Special Features
There are still a few more episodes from Season Five that are not on this new Season Six DVD, which will presumably be released with the Season Seven DVD, alongside the first episodes of Season Six.
In fact, the first episode of Season Six (the actual series, not the DVD) is called Blue Harvest, a one hour special Star Wars feature. The whole of Star Wars Episode Four, Family Guy style, with Chris as Luke, Peter as Han, Lois as Leia, Stewie as Darth Vader, Brian as Chewbacca and Meg as the squid monster in the trash compactor! It will be released seperatley on DVD in January 2008.