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
Gary Alan Marsh
CAM
John Seaton
OUE
Eugene I. Stillman
JOT
Jack Walsh
TRG
Mark Lawhead
Shell Dweller
Robert Feero
Chrome Robot
Johnny Weissmuller Jr.
Chrome Robot
Claudette Bessing
ELC
Susan Stroh
Control Officer
James Wheaton
OMM (voice)
Henry Jacobs
Mark 8 Student
Bill Love
Mark 8 Instructor
Doc Scortt
Monk
Gary Austin
Man in Yellow
Scott L. Menges
Child #1
Toby L. Stearns
Child #2
Paul K. Haje
Trial Prosecutor
Ralph Chesse
Trial Proctor
Dion M. Chesse
Trial Defender
Bruce Chesse
Trial Pontifex
Mello Alexandria
Hologram Dancer
Brandyn Barbara Artis
Hologram Dancer
Morris D. Erby
Hologram Newscaster
Willie C. Barnes
Hologram Comic
Richard Quinnell
Hologram Comic
Jean M. Durand
Hologram Listener
Scott Beach
Announcer (voice)
Neva Beach
Announcer (voice)
Terence McGovern
Announcer (voice)
Julie Payne
Announcer (voice)
James Cranna
Announcer (voice)
Ruth Silveira
Announcer (voice)
Bruce Mackey
Announcer (voice)
David Ogden Stiers
Announcer (voice)
Bart Patton
Announcer (voice)