- Steve Cirbus
- Â Corporal Deke Quinlan / ... 12 episodes, 2007
- Donnie Wahlberg
- Â Captain Horst Cali 8 episodes, 2007
- Michael Hyatt
- Â Lt. Connie Ruebens / ... 8 episodes, 2007
- John Leguizamo
- Â Jake Mendez / ... 8 episodes, 2007
- Adam Cantor
- Â Rocko 8 episodes, 2007
- Geoffrey Cantor
- Â Abe Shelton 8 episodes, 2007
- Christine Evangelista
- Â Ashley Beck 8 episodes, 2007
- Jennifer Ferrin
- Â Chloe 8 episodes, 2007
- Leo Fitzpatrick
- Â Michael / ... 8 episodes, 2007
- Frank Grillo
- Â Albert Roman / ... 8 episodes, 2007
- Michael Hogan
- Â Hawk 8 episodes, 2007
- Wayne Kasserman
- Â Tonray 8 episodes, 2007
- J.D. Williams
- Â Marshall O'Brien, Jr. / ... 8 episodes, 2007
- Michael Kenneth Williams
- Â Quincy 8 episodes, 2007
- Bingo O'Malley
- Â Bernard Kazmicki / ... 8 episodes, 2007
- Jeremy Davidson
- Â Henry Roman / ... 7 episodes, 2007
- Ryan Sands
- Â Leroy / ... 8 episodes, 2007
- Leslie Merrill
- Â Reporter 8 episodes, 2007
- Nick Koesters
- Â Leon / ... 6 episodes, 2007
- Patrick Jordan
- Â Johnny Boy 5 episodes, 2007
- Nick LaMantia
- Â SWAT Member Rascal 5 episodes, 2007
- Ryan Goimarac
- Â SWAT Team Member 7 episodes, 2007
- Andrew McCune
- Â SWAT Team Member #17 5 episodes, 2007
- Dana Ashbrook
- Â Tony 7 episodes, 2007
- Michael McGlone
- Â Deputy Chief Nolan Abrami 7 episodes, 2007
- Joshua Elijah Reese
- Â Derzius 6 episodes, 2007
- Neil Booker
- Â SWAT Team Officer 7 episodes, 2007
- Jeff Hochendoner
- Â Big Stan 4 episodes, 2007
- Peter Appel
- Â Teddy Sabian 5 episodes, 2007
- Ethan Rosenfeld
- Â Robby Sabian 5 episodes, 2007
- Stefanie E. Frame
- Â Renee 5 episodes, 2007
- Jeffrey Jones
- Â Pittsburgh Police Officer 4 episodes, 2007
- David Barckhoff
- Â SWAT team member 4 episodes, 2007
- Kate Rogal
- Â Mary Kim 4 episodes, 2007
- Brandi Engel
- Â Cass / ... 4 episodes, 2007
- Karen Baum
- Â Karen 4 episodes, 2007
- Brandon Stacy Williams
- Â Augie 4 episodes, 2007
- John Gavigan
- Â Jim 3 episodes, 2007
- Tobin Bell
- Â Alan Beck 4 episodes, 2007
- Jeremy Moon
- Â Police Officer 3 episodes, 2007
- Adam Kroloff
- Â Henry 3 episodes, 2007
- Brenna Roth
- Â Marco's Waitress 2 episodes, 2007
- Laurel Hoffman
- Â Lucy Cali 2 episodes, 2007
- Brian Balog
- Â Suited Assistant 2 episodes, 2007
- Patricia Cray
- Â Addie 2 episodes, 2007
- Karen Carbone
- Â Kerry 2 episodes, 2007
- John Hawkinson
- Â Zing 2 episodes, 2007
- Matt Burns
- Â Slim 1 episode, 2007
- Jared Pfennigwerth
- Â Police Officer 1 episode, 2007
- Shawn Shultz
- Â Horst Cali's Son 2 episodes, 2007
- Paula Bellin
- Â News reporter 1 episode, 2007
- Dwayne Pintoff
- Â Police Officer 1 episode, 2007
- Gabe Proietti
- Â S.W.A.T. Officer / ... 2 episodes, 2007
- Christopher Nardizzi
- Â Pittsburgh cop 1 episode, 2007
- Susan Misner
- Â Lorna Ash 1 episode, 2007
- Patrick Sebes
- Â Luke Mendez 1 episode, 2007
- Frank Zieger
- Â Well Dressed Man 1 episode, 2007
- John W. Lawson
- Â Old Vet 1 episode, 2007
- Jason McCune
- Â Bound Cop 1 episode, 2007
- Donald John Volpenhein
- Â Flint 1 episode, 2007
- Patrick Gray
- Â Addie 1 episode, 2007
- Shane Callahan
- Â Roger Coombs 1 episode, 2007
- Alex Hooper
- Â Cameraman 1 episode, 2007
- Aaron Bernard
- Â FBI Agent Stark 1 episode, 2007
- William Kania
- Â Police Officer 1 episode, 2007
- Susan Moran
- Â Bank Customer 1 episode, 2007
- Susanna Harter
- Â Sophia 1 episode, 2007
- Caroline Collins
- Â Ashley's Mother 1 episode, 2007
- Krista Dell
- Â Rocko's girlfriend 1 episode, 2007
- Dean Corsaro
- Â Police Detective 1 episode, 2007
- Sherri Lloyd
- Â Banker 1 episode, 2007
- Brantley Brice
- Â Travis 1 episode
- Robert Stull
- Â Police Officer Laird (uncredited) 7 episodes, 2007
- David Dale McCue
- Â SWAT Member Creeper (uncredited) 6 episodes, 2007
- Jeremy Gladen
- Â Patron / ... (uncredited) 2 episodes, 2007
- John W. Iwanonkiw
- Â Cop (uncredited) 2 episodes, 2007
- Jackson Nunn
- Â TV News Photographer (uncredited) 2 episodes, 2007
- Paul Adamo
- Â Beat cop #3 (uncredited) 2 episodes, 2007
- Kate Easton
- Â Ashley Beck's Sister (uncredited) 1 episode, 2007
- Barret Hackney
- Â Igor Lombar (uncredited) 1 episode, 2007
- Brianna Kellum
- Â Hostage (uncredited) 1 episode, 2007
- Tony Amen
- Â Bank Customer (uncredited) 1 episode, 2007
- David Morse
- Â Swat (uncredited) 1 episode, 2007
- Michelle Vezzani
- Â Police Officer (uncredited) 1 episode, 2007
- Patrick Bradford
- Â Additional (uncredited) 1 episode, 2007
- Minda Briley
- Â FBI Agent (uncredited) 1 episode, 2007
- Joey Boombotze
- Â Under cover fbi (uncredited) 1 episode, 2007
- Robert Liscio
- Â SWAT Team Member (uncredited) 1 episode, 2007
- Roger Dillingham Jr.
- Â Swat Team Alpha Unit (uncredited) 1 episode, 2007
- Daniel Conley
- Â Paramedic (uncredited) 1 episode, 2007
- Taavon Gamble
- Â Pedestrian (uncredited) 1 episode, 2007
- Peter Tocco
- Â SWAT #5 (uncredited) 1 episode, 2007
- Adam Dunhoff
- Â Utility Man (uncredited) 1 episode, 2007
- Nicholas Balzer
- Â Allegheny County Police Officer (uncredited) 1 episode, 2007
- Anthony Mahramus
- Â Cameraman (uncredited) 1 episode, 2007
- Howard Bullard
- Â SWAT #1 (uncredited) 1 episode, 2007
- Renee Downing
- Â War Protestor (uncredited) 1 episode, 2007