Dennis Quaid
James Caviezel
Shawn Doyle
Elizabeth Mitchell
Andre Braugher
Noah Emmerich
Melissa Errico
Daniel Henson
Jordan Bridges
Stephen Joffe

Dennis Quaid as Frank Sullivan
James Caviezel as John Sullivan (as Jim Caviezel)
Shawn Doyle as Jack Shepard
Elizabeth Mitchell as Julia 'Jules' Sullivan
Andre Braugher as Satch DeLeon
Noah Emmerich as Gordo Hersch
Melissa Errico as Samantha Thomas
Daniel Henson as Johnny Sullivan (6 Years)
Jordan Bridges as Graham 'Gib' Gibson
Stephen Joffe as Gordo Hersch (8 Years)
Jack McCormack as Commander Butch O'Connell
Peter MacNeill as Butch Foster
Michael Cera as Gordy Jr. (10 Years)
Marin Hinkle as Sissy Clark
Richard Sali as Chuck Hayes