Season 1:
Interviews with Chris Carter about 12 of his favorite episodes
Paranormal and Alien Abduction Trivia and Weblinks
Cross Reference of 24 Previews
11-minute "Truth About Season One" documentary
47 promotional television spots
DVD-ROM Games
11 "Behind-the-Truth" segments from F/X
Season 2:
"The Truth About Season Two" Documentary
Chris Carter talks about 12 episodes from Season Two
Special effects clips
Behind-the-scenes clips
Deleted scenes
9 "Behind-the-truth" spots from F/X
49 promotional television spots
Season 3:
Documentary: "The Truth About Season Three"
12 interviews with Chris Carter
Special effects clips
Behind the scenes
Deleted scenes
Behind the truth spots on 17 episodes
Promo spots on all 24 episodes
DVD-ROM game - "Unholy Alliances"
Season 4:
Documentary "The Truth About Season Four"
Interviews with Frank Spotnitz on "Herrervolk," Vince Gilligan on "Unruhe" and "Paper Hearts," James Wong on "Home" and Chris Carter on "Tunguska"
13 "Behind the Truth" spots from F/X
Episode commentary from "Memento Mori" with writer/producer Frank Spotnitz
Episode commentary from "Small Potatoes" with writer/producer Vince Gilligan
8 special effects clips with commentary by Paul Rabwin
9 deleted scenes with optional commentary by Chris Carter
48 promotional television spots
DVD ROM: Game - Urbs Tertia
Season 5:
Documentary: "The Truth About Season Five"
46-minute F/X special: "Inside The X-files"
6 deleted scenes with optional commentary by Chris Carter
8 special effects sequences with commentary by Paul Rabwin
Episode commentary from "The Post-Modern Prometheus" by Chris Carter
Episode commentary from "The Pine Bluff Variant" by John Shiban
11 "Behind the Truth" F/X spots
40 promotional TV spots
DVD ROM: Game "Earthbound"
Season 6:
Documentary: "The Truth About Season Six"
"Behind the Scenes" featurette
15 deleted/alternate scenes with optional commentary by Frank Spotnitz
13 special effects sequences with commentary by Paul Rabwin
Character profile on the Cigarette Smoking Man
Episode commentary on "Triangle" by Chris Carter
Episode commentary on "Milagro" by Kim Manners
44 promotional television spots
24 international language clips
DVD-ROM game "Dreamland"
Season 7:
Commentary by Chris Carter, Gillian Anderson and Vince Gilligan
30-minute documentary: "The Truth About Season 7"
10 deleted scenes with optional commentary by Chris Carter
13 special effects featurettes with commentary by Paul Rabwin
44 promotional TV spots
17 international language clips
DVD-ROM game "Maitreya 2.0"
PlayStation 2 game preview
Season 8:
Commentary by Frank Spotnitz on 'Alone'
Commentary by Kim Manners on 'Existence'
Documentary: "The Truth About Season Eight"
Seven deleted scenes with optional commentary by Frank Spotnitz and John Shiban
Seven special-effects sequences with commentary by Paul Rabwin
Character profiles on Alex Krycek, Gibson Praise, and John Doggett
42 promotional television spots
6 international language clips
DVD-ROM game: Existence
Season 9:
Commentary by Chris Carter on "Improbable"
Commentary by Vince Gilligan, John Shiban, and Frank Spotnitz on "Jump the Shark"
Commentary by Kim Manners on "The Truth"
10 deleted scenes with optional commentary by Frank Spotnitz and Chris Carter
Special effects featurettes
"The Truth About Season 9"
"The Making of 'The Truth'"
Profiles: Monica Reyes, Brad Follmer, Cake Cutting, On Location
TV spots and international clips
DVD-ROM game: "The Truth"