DISC 5
* Widescreen versions of “… In Translation,” “Numbers,” “Deus Ex Machina” and “Do No Harm.”

DISC 6
* Widescreen versions of “The Greater Good,” “Born To Run” and “Exodus.”

DISC 7
The seventh disc is all extras, and is divided into three sections: “Departure,” “Tales From the Island” and “Lost Revealed.”

“Departure” includes:
* “The Genesis of Lost” (8:40): A documentary in which ABC exec Lloyd Braun reveals he wanted to make “Castaway: The Series.” J.J. Abramas reveals how he built on that idea.
* “Designing a Disaster” (7:59): A documentary detailing, among other things, how they got the middle part of a widebody jet from a plane graveyard in the Mojave Desert to a beach in Oahu, and how they got the front of the same widebody to a jungle on the same island. All in six weeks.
* “Before They Were Lost” (22:55): A documentary examining the unusual “Lost” casting process, which saw the show’s masterminds creating new regular characters tailored to actors they met and liked. Hurley, Sayid, Sun and Jin were among those unmentioned in the original outline ABC bought. We’re reminded that the original plan was to have Michael Keaton play Jack, and that Kate was originally supposed to emerge as the leader of the survivors.
* “Audition Tapes” (27:34): We see all 13 of the 14 of the regulars (Terry O’Quinn had already worked extensively with Abrams on “Alias”) run through some script pages. We get to see Yunjin Kim read for Kate. We get to see Matthew Fox, Dominic Monaghan and even Jorge Garcia play Sawyer.
* “Welcome To Oahu: The Making of the Pilot” (33:20): This is largely a how-they-did-it doc, dealing with those horrifying mid-flight scenes, and the monster in the trees, and the polar bear, and the guy-gets-sucked-into-a-jet engine gag, and other things. (Some interesting stuff about the series’ strange musical score too.)
* “The Art of Matthew Fox” (6:07): Fox discusses the many photos he took on the set as sad music plays.
* “Lost@Comicon” (1:50): A look at how high anticipation was for the series, even months prior to its premiere, thanks largely to buzz on the Internet.

“Tales From the Island” includes:
* “Lost: On Location” offers short behind-the-scenes documentaries about individual episodes, including “House of the Rising Sun” (7:19), “Confidence Man” (4:24), “All The Best Cowboys Have Daddy Issues” (4:56), “Whatever The Case May Be” (2:58), “Hearts and Minds” (6:20), “Special” (3:05) and the finale, “Exodus” (9:21), plus “The Trouble With Boars” (5:09), a look at the difficulties wrangling the animals during several episodes.
* “On Set With Jimmy Kimmel” (7:15) sees the host of ABC’s late-night talk show visit the cast in Hawaii.
* “Backstage With Drive Shaft” (6:40) teaches us, among other things, how a snippet of dialogue from the Phil Donahue show became the lyrics of Charlie’s biggest hit.

“Lost Revealed” includes:
* “The Lost Flashbacks” are two scenes cut from “Exodus.” One deals with Claire and the doomed pilot discussing psychics (3:07); the other deals with Sayid buying a necktie to impress Nadia (1:28).
* “Deleted Scenes” include “Smoking” (1:10) with Charlie and Sawyer having a meeting of the minds, “Chicken or Lasagna” (0:43) with Hurley trying to engage a silent Locke, “Kate and Sayid” (1:09) with one realizing something about the other, “The Climb” (2:02) with Shannon’s hilarious reaction to Charlie’s attempt to impress her, “The Tell” (1:04) with Locke and Walt discussing liars, and “Partners” (0:55) with Boone and Shannon visually contrasting Sun and a handcuffed Jin.
* “Bloopers From The Set” (4:17) is lots of flubbed lines and falling down.
* “Live From The Museum of Television and Radio” (10:56) presents comic highlights from last March’s Paley Festival Q&A with Abrams and nine members of the cast.