George Lucas	...	(Director)
George Lucas, George Lucas	...	(Writer)
Robert Duvall	...	THX
Donald Pleasence	...	SEN
Don Pedro Colley	...	SRT
Maggie McOmie	...	LUH
Ian Wolfe	...	PTO
Marshall Efron	...	TWA
Sid Haig	...	NCH
John Pearce	...	DWY
Irene Cagen	...	IMM (as Irene Forrest)
Gary Alan Marsh	...	CAM
John Seaton	...	OUE
Eugene I. Stillman	...	JOT
Jack Walsh	...	TRG (as Raymond J. Walsh)
Mark Lawhead	...	Shell Dweller
Robert Feero	...	Chrome Robot #1

Summary: Two-Disc Special Edition:
* Digitally remastered with THX certified sound
* Commentary by George Lucas and co-writer/sound effects editor Walter Murch
* "Theatre of Noise" sound-effects track with branching segments to 13 master sessions with Walter Murch
* 2 New documentaries: "A Legacy of Filmmakers: The Early Years of American Zoetrope" and "Artifacts from the Future: The Making of THX 1138"
* George Lucas's original student film "THX-11384EB"
* "Bald": 1971 production featurette
* Five new trailers from the 2004 theatrical release
* Original theatrical trailer