Diana Skouris / Narrator (44 episodes, 2004-2007)
Tom Baldwin (44 episodes, 2004-2007)
Shawn Farrell (44 episodes, 2004-2007)
Maia Rutledge / Maia Skouris / Maia Rutledge Skouris (44 episodes, 2004-2007)
Kyle Baldwin (35 episodes, 2004-2007)
Richard Tyler (33 episodes, 2004-2007)
Marco Pacella (32 episodes, 2004-2007)
Jordan Collier (27 episodes, 2004-2007)
Isabelle Tyler (25 episodes, 2006-2007)
Nina Jarvis (24 episodes, 2005-2006)
Jed Garrity (21 episodes, 2005-2007)
Lily Moore Tyler / Lily Moore (20 episodes, 2004-2007)
Alana Mareva (18 episodes, 2005-2006)
Danny Farrell (16 episodes, 2004-2007)
Kevin Burkhoff (15 episodes, 2005-2007)
Devon (14 episodes, 2005-2007)
Meghan Doyle (13 episodes, 2007)
Dennis Ryland (14 episodes, 2004-2006)
Susan Farrell (13 episodes, 2004-2007)
Matthew Ross (12 episodes, 2005-2006)
Isabelle / Toddler Isabelle (11 episodes, 2005-2007)
April Skouris (9 episodes, 2005-2007)
Brady Wingate (9 episodes, 2005-2007)
Nikki Hudson (8 episodes, 2004-2006)
Cassie Dunleavy (8 episodes, 2007)
P.J. (8 episodes, 2005-2007)
Tess Doerner (7 episodes, 2005-2007)
Linda Baldwin (7 episodes, 2004-2005)
Brian Moore (7 episodes, 2004-2005)
Joanna (7 episodes, 2007)
Ben Saunders (6 episodes, 2006-2007)
Heather Tobey (6 episodes, 2005-2007)
Lucy / Claire (6 episodes, 2004-2005)
Heidi Moore (5 episodes, 2004-2005)
T.J. Kim / Nurse (4 episodes, 2004-2006)
Wendy Paulson (4 episodes, 2005)
Dr. Mayhew (4 episodes, 2004-2006)
Sid Stradner (4 episodes, 2004)
Amy Paspalis (4 episodes, 2006)
Gary Navarro (3 episodes, 2005-2006)
Rebecca Parrish (3 episodes, 2007)
Liv (3 episodes, 2005)
Daniel Armand (3 episodes, 2006)
Boyd Gelder (3 episodes, 2006)
Dr. Nicholas Clayton (3 episodes, 2005-2007)
Lindsey Hammond (3 episodes, 2006-2007)
Dr. Max Hudson (3 episodes, 2005)
Tyler Downing (3 episodes, 2006)
Dr. Anapurn (3 episodes, 2006)
Maia's Father / Victor Rutledge (3 episodes, 2004-2007)
Maia's Mother / Mary Rutledge (3 episodes, 2004-2007)
Middle-Aged Man / Werner Loecher (3 episodes, 2004-2005)
Young Man / Agent Falcone (3 episodes, 2004-2005)
Orson Bailey (2 episodes, 2004-2005)
Will / Will, Homeless Man (2 episodes, 2006-2007)
Sarah (2 episodes, 2006)
Senator Lenhoff (2 episodes, 2007)
Drew Imroth (2 episodes, 2007)
Warren Lytell (2 episodes, 2004)
Curtis Peck (2 episodes, 2007)
Gabriel Hewitt (2 episodes, 2007)
Abigail Hunnicutt (2 episodes, 2007)
Adam Kensington (2 episodes, 2004)
Alison Driscoll (2 episodes, 2005)
Barbara Yates (2 episodes, 2004)
Colin Chen (2 episodes, 2004)
Agent Park (2 episodes, 2005)
Lloyd (2 episodes, 2007)
Judge Biederman (2 episodes, 2005-2006)
Duncan Germaine (2 episodes, 2006)
Gregory Kensington (2 episodes, 2004)
Guard / Military Policeman (2 episodes, 2004-2006)
Elizabeth Bailey (2 episodes, 2004)
2nd Intruder / Highway Patrolman (2 episodes, 2005-2007)
Kenneth Griffin (2 episodes, 2004)
Isabelle (2 episodes, 2005-2007)
Patty Griffin (2 episodes, 2004)
Rose Woodard (2 episodes, 2005)
Paul Beckman / Reporter (2 episodes, 2006-2007)
Wayne (2 episodes, 2005)
Ruth (2 episodes, 2005)
Janitor (2 episodes, 2005)
Karen / Karen - Telephone Operator (2 episodes, 2005)
Paul Newbold (2 episodes, 2006)
Meghan's Father (2 episodes, 2007)
Eden Standish (2 episodes, 2005)
Tina Richardson (2 episodes, 2006)
ACLU Lawyer (2 episodes, 2004)
Air Force Officer (2 episodes, 2004-2005)
Aaronson / Security Guard (2 episodes, 2005-2007)
Homeless Man (2 episodes, 2004)
Quarantine Official (2 episodes, 2004)
Morgue Attendant / Secretary (2 episodes, 2004-2006)
Announcer One (2 episodes, 2004)
Older Man (2 episodes, 2004)
Older Woman (2 episodes, 2004)
Young Woman (2 episodes, 2004)
China Newscaster / Newscaster - China (2 episodes, 2004)
Africa Newscaster / Newscaster - Africa (2 episodes, 2004)
India Newscaster / Newscaster - India (2 episodes, 2004)
Japan Newscaster / Newscaster - Japan (2 episodes, 2004)
Announcer Two (2 episodes, 2004)
Reporter (2 episodes, 2004)
Ryan / Ryan Powell (2 episodes, 2004-2007)
Joe / Security Guard (1 episode, 2004-2005)
Doherty (1 episode, 2005)
Olivia Germaine (2 episodes, 2006)
Carol / Carol Sumlin (2 episodes, 2005-2006)
Orderly (1 episode, 2006)
Jean DeLynn Baker (1 episode, 2005)
Mitch Baldwin (1 episode, 2006)
Carl Morrissey (1 episode, 2004)
Trent Appelbaum (1 episode, 2005)
Major Culp (1 episode, 2005)
Lily Moore Tyler (1 episode, 2006)
Todd Barstow (1 episode, 2006)
Josh Sandler (1 episode, 2006)
Darren Piersahl (1 episode, 2006)
General (1 episode, 2007)
Brandon Powell (1 episode, 2007)
Audrey Parker (1 episode, 2007)
Shannon (1 episode, 2007)
Oliver Knox (1 episode, 2004)
Rev. Josiah (1 episode, 2005)
Dravitt (1 episode, 2005)
Chloe Granger (1 episode, 2005)
Keane Driscoll (1 episode, 2006)
Christopher Dubov (1 episode, 2006)
Nick Crowley (1 episode, 2006)
Young Isabelle Tyler (1 episode, 2007)
Kara (1 episode, 2007)
Graham Holt (1 episode, 2007)
Peter Barton (1 episode, 2007)
Young Audrey Parker (1 episode, 2007)
Stewart Hanley (1 episode, 2007)
Grace Morrissey (1 episode, 2004)
Dean Keating (1 episode, 2004)
Sheriff Jim Conrad (1 episode, 2004)
Lee Kendall (1 episode, 2005)
Greg Venner (1 episode, 2005)
Elise Appelbaum (1 episode, 2005)
Older Maia (1 episode, 2005)
Lucy Gelder (1 episode, 2006)
Colin McGrath (1 episode, 2007)
Kathy (1 episode, 2007)
Aquino (1 episode, 2007)
Glen Keating (1 episode, 2004)
Edwin Mayuya (1 episode, 2005)
Jake (1 episode, 2005)
Dmitri Kazar (1 episode, 2005)
Philip Kendrick (1 episode, 2005)
Claudio Borghi (1 episode, 2006)
Randy Atwater (1 episode, 2006)
Milo (1 episode, 2006)
Sheriff (1 episode, 2007)
Donald Mitchell (1 episode, 2007)
Dr. Roxanne Kern (1 episode, 2004)
Sam Marsden (1 episode, 2005)
Teddy (1 episode, 2005)
James Willis (1 episode, 2005)
John Shaffner (1 episode, 2006)
Naomi Bonderman (1 episode, 2006)
Jane Nance (1 episode, 2006)
Adam Spiegelman (1 episode, 2006)
Haspelcorp Lab Tech (1 episode, 2006)
Mrs. Powell (1 episode, 2007)
Cora Tomkins (1 episode, 2007)
Larry (1 episode, 2007)
Michael Ancelet (1 episode, 2007)
Anastasia (1 episode, 2007)
SWAT Team Leader (1 episode, 2007)
Felicia (1 episode, 2004)
Burt Krochuk (1 episode, 2004)
Ben Hunsiker (1 episode, 2005)
Minister (1 episode, 2005)
Joey Lasco (1 episode, 2005)
Coach Winfrey (1 episode, 2005)
Zachary Gidlund (1 episode, 2006)
Liza (1 episode, 2006)
Malcolm (1 episode, 2006)
NSA Agent 1# (1 episode, 2006)
Fisherman (1 episode, 2006)
Erika Lundgren (1 episode, 2006)
Amber (1 episode, 2007)
Jack Delphy (1 episode, 2007)
Neal Handler (1 episode, 2007)
Eileen Trask (1 episode, 2007)
Henders (1 episode, 2007)
Dale McMurphy (1 episode, 2007)
Brad Rossi (1 episode, 2004)
Aaron Mitchell (1 episode, 2004)
Tony (1 episode, 2004)
Mrs. Martino (1 episode, 2004)
David Kendrick (1 episode, 2005)
Frank Venner (1 episode, 2005)
Agent Hubbard (1 episode, 2005)
Motel Manager (1 episode, 2005)
Henry (1 episode, 2005)
Cute Young Clerk (1 episode, 2005)
Bryce Kovec (1 episode, 2005)
Chrissy (1 episode, 2006)
Judge Van Kirk (1 episode, 2006)
Patrick Lundgren (1 episode, 2006)
Center Physician (1 episode, 2006)
NSA Agent 2# (1 episode, 2006)
Reporter (1 episode, 2007)
Paul Weir (1 episode, 2007)
Philip Delacroix (1 episode, 2007)
Randolph Denning (1 episode, 2007)
Dr. Walt Saperstein (1 episode, 2007)
Sophia (1 episode, 2007)
City Resident (1 episode, 2007)
Warren Trask (1 episode, 2007)
Evee (1 episode, 2007)
Maureen (1 episode, 2004)
Florist (1 episode, 2004)
Charlie (1 episode, 2004)
Tara Kendrick (1 episode, 2005)
Harmon Sloan (1 episode, 2005)
Dr. Hodler (1 episode, 2005)
Natalya Rios (1 episode, 2005)
Nate McCullough (1 episode, 2005)
Dr. Ellsworth (1 episode, 2006)
Mischa (1 episode, 2006)
Agent Ruddy (1 episode, 2006)
Ryland's Assistant (1 episode, 2006)
Jorge Molina (1 episode, 2006)
Actor Playing Matthew (1 episode, 2007)
Hanna (1 episode, 2007)
Doctor (1 episode, 2007)
Director of Photography (1 episode, 2007)
Jacqui Glendon (1 episode, 2007)
Dalton Gibbs (1 episode, 2007)
Riva (1 episode, 2007)
Tim (1 episode, 2007)
Minister (1 episode, 2007)
Park Thug (1 episode, 2004)
Cop (1 episode, 2004)
Principal (1 episode, 2004)
Roy Keith Marsden (1 episode, 2005)
Molly Caldicott (1 episode, 2005)
Jane Orman (1 episode, 2005)
Lew Ross (1 episode, 2005)
Eric Papequash (1 episode, 2005)
Miles Quinlan (1 episode, 2005)
Helena (1 episode, 2005)
Corporate Receptionist (1 episode, 2006)
Agent Wood (1 episode, 2006)
Lee Piersahl (1 episode, 2006)
Lab Technician (1 episode, 2006)
Molly (1 episode, 2006)
Byron Lillibridge (1 episode, 2007)
Vanessa Martin (1 episode, 2007)
Dr. Griffith (1 episode, 2007)
Max Kopelow (1 episode, 2007)
Gloria (1 episode, 2007)
Mark (1 episode, 2007)
Billy (1 episode, 2007)
Don Incubus / Phil (1 episode, 2007)
Reporter #1 (1 episode, 2007)
Gibson (1 episode, 2004)
NTAC Agent (1 episode, 2004)
Stacey Papequash (1 episode, 2005)
Alma (1 episode, 2005)
Wilson (1 episode, 2005)
Security Guard (1 episode, 2005)
Iris (1 episode, 2005)
David Sumlin (1 episode, 2005)
Agent Mills (1 episode, 2005)
Laurent Ganning (1 episode, 2005)
Paul Beckman (1 episode, 2005)
Mike Ross (1 episode, 2005)
Wheat Field Reporter (1 episode, 2006)
Jessica (1 episode, 2006)
Barry (1 episode, 2006)
Glenn (1 episode, 2006)
Lewis Mesirow (1 episode, 2006)
Custodian (1 episode, 2006)
Duane (1 episode, 2007)
Troy Kennedy (1 episode, 2007)
Fry Cook (1 episode, 2007)
Actor Playing Imroth (1 episode, 2007)
Lucas (1 episode, 2007)
Young Tom (1 episode, 2007)
Paramedic (1 episode, 2007)
Store Employee (1 episode, 2007)
Justin (1 episode, 2007)
Reporter #2 (1 episode, 2007)
Terry Bennett (1 episode, 2004)
Driver (1 episode, 2004)
Player (1 episode, 2004)
Medic (1 episode, 2005)
Evan (1 episode, 2005)
Newscaster (1 episode, 2005)
Dwight (1 episode, 2005)
Dr. Boll (1 episode, 2006)
Lab Attendant (1 episode, 2006)
Tim McCarren (1 episode, 2006)
Driver (1 episode, 2006)
Greg (1 episode, 2006)
Principal Meyer (1 episode, 2007)
Ambulance Driver (1 episode, 2007)
Ray Haugen (1 episode, 2007)
Actor Playing Cardinal (1 episode, 2007)
Young Paul (1 episode, 2007)
2nd Guard (1 episode, 2007)
Jason (1 episode, 2007)
School Teacher (1 episode, 2007)
Daycare Worker (1 episode, 2004)
Dorothy (1 episode, 2004)
Woman at Lake (1 episode, 2004)
Celeste Kazar (1 episode, 2005)
Matthew Lombard (1 episode, 2005)
Sal Lasco (1 episode, 2005)
Administrator (1 episode, 2005)
Roger Wolcott (1 episode, 2005)
Anne Werth (1 episode, 2005)
Marnie (1 episode, 2005)
Peter Sumlin (1 episode, 2005)
Soldier (1 episode, 2006)
Paula Nakata (1 episode, 2006)
Bridal Consultant (1 episode, 2006)
Taxi Driver (1 episode, 2006)
NTAC Hallway Guard (1 episode, 2006)
CIA Spook (1 episode, 2007)
Mr. Dunlop (1 episode, 2007)
Juliet Delvecci (1 episode, 2007)
Captain Tierney (1 episode, 2007)
Young Kathy (1 episode, 2007)
Wife (1 episode, 2007)
Burly Man (1 episode, 2007)
Triage Nurse (1 episode, 2007)
Lt. Payton (1 episode, 2004)
Park Mugger #1 (1 episode, 2004)
Mrs. Benke (1 episode, 2004)
Billy (1 episode, 2005)
Sara James (1 episode, 2005)
Arlo (1 episode, 2005)
Bio Agent (1 episode, 2005)
Officer Kenney (1 episode, 2005)
Sebastian Werth (1 episode, 2005)
Martin (1 episode, 2005)
Rita Lopez (1 episode, 2005)
Alex Messina (1 episode, 2006)
NTAC Medical Nurse (1 episode, 2006)
Reporter #1 (1 episode, 2006)
Medical Examiner (1 episode, 2007)
Private Jones (1 episode, 2007)
Agent Ashmore (1 episode, 2007)
Husband (1 episode, 2007)
ATM Customer #1 (1 episode, 2007)
Collier Bodyguard (1 episode, 2007)
Businessman (1 episode, 2007)
Park Mugger #2 (1 episode, 2004)
Newscaster (1 episode, 2004)
Lloyd (1 episode, 2005)
Fireman (1 episode, 2005)
Clarice (1 episode, 2005)
Michael Berman (1 episode, 2005)
Laurel Bryce (1 episode, 2005)
Joanne (1 episode, 2005)
Sheriff Cobb (1 episode, 2005)
General Randa (1 episode, 2006)
Reporter (1 episode, 2006)
Reporter #2 (1 episode, 2006)
Private Mahoney (1 episode, 2007)
Male Citizen (1 episode, 2007)
ATM Customer #2 (1 episode, 2007)
Cop #1 (1 episode, 2007)
Rental Manager (1 episode, 2004)
Theresa Baron (1 episode, 2004)
Lyndon (1 episode, 2005)
Cop (1 episode, 2005)
Gabriel (1 episode, 2005)
Reporter #1 (1 episode, 2005)
Walter (1 episode, 2005)
Lloyd (1 episode, 2006)
Dante Ferilli (1 episode, 2006)
Art Institute Registrar (1 episode, 2007)
Cop #2 (1 episode, 2007)
Female Citizen (1 episode, 2007)
ATM Customer #3 (1 episode, 2007)
Alan Kushner (1 episode, 2004)
Quarantine Technician (1 episode, 2004)
Dewey (1 episode, 2005)
Owen (1 episode, 2005)
Olivia Cohen (1 episode, 2005)
Forensics Technician (1 episode, 2006)
Committee Head (1 episode, 2006)
Bureaucrat (1 episode, 2007)
Kimmy (1 episode, 2005)
Ryland's Attorney (1 episode, 2006)
Photographer (1 episode, 2006)
Young Hustler (1 episode, 2006)
Arresting Cop (1 episode, 2007)
Jeanine - Carrie's Mom (1 episode, 2005)
Cartwright (1 episode, 2005)
Shadow (1 episode, 2005)
Corey (1 episode, 2006)
Dr. Sawyer (1 episode, 2007)
Carrie (1 episode, 2005)
Husky Boyfriend (1 episode, 2005)
Dr. Emily Sanford (1 episode, 2004)
Guard (1 episode, 2005)
Peter McClenahan (1 episode, 2006)
Young Mother (1 episode, 2007)
Wesley Hauser (1 episode, 2006)
Process Server (1 episode, 2004)
Gwen (1 episode, 2005)
Man on Crutches (1 episode, 2005)
Jung Pak (1 episode, 2006)
Store Owner (1 episode, 2005)
Phillipa Bynes (1 episode, 2006)
Mechanic #1 (1 episode, 2005)
General Watt (1 episode, 2006)
Mechanic #2 (1 episode, 2005)
Christopher Luth (1 episode, 2006)
Orderly (1 episode, 2005)
Sick Woman (1 episode, 2005)
Brian Moore look-alike (1 episode, 2004)
Albert (1 episode, 2005)
Ryan Freel (1 episode, 2006)
Amy's Mom (1 episode, 2006)
Secretary (1 episode, 2006)
Frank (1 episode, 2006)
Realtor (1 episode, 2006)
Claire Downing (1 episode, 2006)
Cab Driver (1 episode, 2006)
Wedding Guest (1 episode, 2006)
Deputy (uncredited) (1 episode, 2004)
Street Thug (uncredited) (1 episode, 2004)
Media / Reporter (uncredited) (1 episode, 2004)
Museum visitor (uncredited) (1 episode, 2005)
Doug Avery (uncredited) (1 episode, 2005)
Gala Attendee (uncredited) (1 episode, 2005)
Guard (uncredited) (1 episode, 2006)
Traveller (uncredited) (1 episode, 2006)
Man watching Collier's speech (uncredited) (1 episode, 2007)
Body Guard (uncredited) (1 episode, 2007)
Mr. Winters (uncredited) (1 episode, 2007)
Killer Clown (uncredited) (1 episode, 2007)
Japanese agent #1 (uncredited) (1 episode, 2007)
(uncredited) (1 episode, 2007)
Messenger (uncredited) (1 episode, 2007)
Kay (uncredited) (1 episode, 2007)
Japanese agent #2 (uncredited) (1 episode, 2007)