- Salli Richardson-Whitfield - Kelly
- Keir Gilchrist - Danny Sheperd
- Stephen Amell - Ian Harrington
- Patrick Garrow - Cicero Creed
- Katheryn Winnick - Julie Snyder
- Steve Byers - Ben Nugent
- Martin Roach - Avery Nash
- Martin Roach - Agent Avery Nash
- Martin Roach - Agent #2
- Adam MacDonald - Douglas
- Alberta Watson - Mrs. Mastriani
- Peter Keleghan - Senator Metcalf
- Jeff Douglas - Kevin Schantz
- Vondie Curtis-Hall - Agent Vic Martinsen
- Laura Catalano - Evelyn Grant
- Brittany Bristow - Shayla Andrews
- David Huband - Intense Man
- Dennis James - Rough Looking Man
- Jefferson Mappin - Rent-A-Cop
- J.C. Kenny - Reporter
- Christopher Ralph - Hunter
- Mary Wall - Sharon Winters
- Rob Smith - Detective Anderson
- Alison MacLeod - Betty Winters
- Alec McClure - Cliff Sillinger
- Matt Cooke - Chuck Delong
- Stephen R. Hart - Demonic Scarecrow
- Joe Bostick - Agent #1
- Kathryn Haggis - FBI Woman
- Dusan Dukic - Chet Ryker
- Maria Ricossa - Toni Mastriani
- Ned Vukovic - Dr. Tilman
- Michael Rhoades - Kenneth Wilhite
- Alexander Conti - Tommy Wilhite
- Joel Rinzler - Earl Pevney
- Glen McDonald - Manny Clarke
- Ricardo Betancourt - Tom Banks
- Anthony Hylton - Baggage Handler #1
- Bobby Prochaska - Baggage Handler #2
- James Binkley - Baggage Handler #3
- John Tench - Mal Oswald
- April Mullen - Cara Crenshaw
- Mark Melymick - Mike Crenshaw
- Michèle Duquet - Diane Crenshaw
- Alec Stockwell - Dean Lovano
- Austin Strugnell - Billy Weaver
- Daveed Louza - Clerk
- Geoffrey Pounsett - Sgt. Denson
- Arlene Duncan - Janine Eberhard
- Gina Wilkinson - Theresa Rasenti
- Gary Reineke - Ted Banfield
- Joan Heney - Betty Jacobs
- Robert Lee - FBI Tech
- David Usher - FBI SWAT Officer
- Jason Knight - Ron Hartman
- John Bourgeois - Jess' Dad
- Aaron Ashmore - Colin McNeil (credit only)
- Aaron Ashmore - Colin McNeil
- Christopher Jacot - Patrick
- Julian Richings - Doc
- Athena Karkanis - Tamara Corday
- Salvatore Antonio - Chad Fletcher (as Salvatore Migliore)
- Rob Stewart - Jim Michaelson
- Greg Bryk - Mr. Keegan
- Kevin Hanchard - Agent Richard Hamilton
- Karen Robinson - Elena Spencer
- Tony Nappo - Attorney Leo Dupont
- Dillon Casey - Steve Biggs
- Zoie Palmer - Tracy Somers
- Matthew Lemche - Private Giovener (as Matt Lemche)
- Lyriq Bent - Dante
- Sasha Roiz - Randall Markham
- George Masswohl - Damien Belson
- Joy Tanner - Dr. Laurel Bennett
- Meg Cabot
Julian Richings interpreta a Doc en la serie.
Lyriq Bent interpreta a Dante en la serie.
Greg Bryk interpreta a Mr. Keegan en la serie.
Caterina Scorsone hace el papel de Jess Mastriani.
Vivica A. Fox interpreta a Nicole Scott en la serie.
Mark Consuelos hace el papel de Antonio Cortez.
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