William Devane
President James Heller (35 eps)
Kiefer Sutherland
Jack Bauer (24 eps)
Mary Lynn Rajskub
Chloe O'Brian (24 eps)
Alberta Watson
Erin Driscoll (24 eps)
Louis Lombardi
Edgar Stiles (24 eps)
Reiko Aylesworth
Michelle Dessler (24 eps)
Lana Parrilla
Sarah Gavin (24 eps)
Kim Raver
Audrey Raines (24 eps)
Shohreh Aghdashloo
Dina Araz (24 eps)
Roger Cross
Curtis Manning (24 eps)
Carlos Bernard
Tony Almeida (18 eps)
Arnold Vosloo
Habib Marwan (17 eps)
Geoff Pierson
John Keeler (12 eps)
Gregory Itzin
Charles Logan (8 eps)
Logan Marshall-Green
Richard Heller (7 eps)
Aisha Tyler
Marianne Taylor (7 eps)
Jonathan Ahdout
Behrooz Azar (6 eps)
Tony Plana
Omar (5 eps)
Ned Vaughn
Mitch Anderson (4 eps)
John Allen Nelson
Walt Cummings (4 eps)
Lukas Haas
Andrew Paige (3 eps)
Mia Kirshner
Mandy (3 eps)
Leighton Meester
Debbie Pendleton (3 eps)
Vic Chao
Agent McCallan (3 eps)
Kevin Alejandro
Kevin (3 eps)
Albie Selznick
John Reiss (2 eps)
Angela Goethals
Maya Driscoll (2 eps)
Brandon Barash
Brandon (2 eps)
Diego Serrano
Agent Solarz (2 eps)
Mo Gallini
Abdul Mahnesh (2 eps)
Shawn Doyle
Ronnie Lobell (2 eps)
Nicholas Kadi
Ahmet (2 eps)
Chris Olivero
Kevin Keeler (1 eps)
Keith Szarabajka
Robert Morrison (1 eps)
Lawrence Monoson
Gary (1 eps)
Assaf Cohen
Yassir (1 eps)
Hector Luis Bustamante
Dr. Martinez (1 eps)
Jonathan Del Arco
Ian (1 eps)
Gary Weeks
Agent Dalton (1 eps)
Gwendoline Yeo
Melissa Rabb (1 eps)
Michael Benyaer
Naseem (1 eps)
Brent Briscoe
Doug (1 eps)
Matt Salinger
Mark Kanar (1 eps)
Darby Stanchfield
Shari (1 eps)
Zilah Mendoza
Farah (1 eps)
Richard Marcus
Forbes (1 eps)
Jim Calvert
Security Guard (1 eps)
Evan Handler
David Weiss (1 eps)
Anthony Azizi
Rafique (1 eps)
John Thaddeus
Joe Prado (1 eps)
Elyse Mirto
Hurt Woman (1 eps)
Joseph Hacker
Press Secretary (1 eps)
Tzi Ma
Cheng Zhi (1 eps)
Faran Tahir
Tomas Sherek (1 eps)
Brittany Ishibashi
Melanie (1 eps)