He says that the woman's voice ("Everything you need is around you. The only danger is inside you.") is Mary Beth Hurt's, from a movie called "Lightsleeper", directed by Paul Schrader in 1992. It also starred Willem Dafoe and Susan Sarandon.
Mark also wrote that the male voice is Jeremy Irons' from the movie "Damage," from Louis Malle, also in 1992. Mark transcribed the passages this way:
(Jeremy Irons in Damage)
The feeling that (3:23) I HAVEN'T BEHAVED AS I SHOULD. You know, what you were saying in Hartley about passion... You were right. I was distanted. I know I was.
(Mary Beth Hurt in Lightsleeper)
(3:26) EVERYTHING YOU NEED IS AROUND YOU, THE ONLY DANGER IS INSIDE YOU
(Jeremy Irons in Damage)
(3:34) YOU SEE, I THOUGHT YOU COULD CONTROL LIFE...
(3:39) BUT IT'S NOT LIKE THAT... There are things you...
(3:42) THERE ARE THINGS YOU CAN'T CONTROL
The feeling that (3:23) I HAVEN'T BEHAVED AS I SHOULD. You know, what you were saying in Hartley about passion... You were right. I was distanted. I know I was.
(Mary Beth Hurt in Lightsleeper)
(3:26) EVERYTHING YOU NEED IS AROUND YOU, THE ONLY DANGER IS INSIDE YOU
(Jeremy Irons in Damage)
(3:34) YOU SEE, I THOUGHT YOU COULD CONTROL LIFE...
(3:39) BUT IT'S NOT LIKE THAT... There are things you...
(3:42) THERE ARE THINGS YOU CAN'T CONTROL
Mike Portnoy also pointed out that the man and woman saying "What are you doing?" after the first verse are Robert DeNiro and Meryl Streep from the movie Falling In Love.
The low spoken parts, such as "Resistance", etc., at the beginning of the song, are Mike Portnoy.