• 
  Mikael Salomon

  regizor

• 
  Robert Schenkkan

  scenarist

• 
  Viola Davis

  dr. Charlene Barton
• 
  Eric McCormack

  Jack Nash
• 
  Daniel Dae Kim

  dr. Tsi Chou
• 
  Christa Miller

  dr. Angela Noyce
• 
  Benjamin Bratt

  dr. Jeremy Stone
• 
  Louis Ferreira

  Colonel James C. Ferrus

• 
  Magda Apanowicz

  Suzie Travis
• 
  Michael Teigen
• 
  Nels Lennarson
• 
  Luke Camilleri

  Gordo
• 
  Jacob Blair
• 
  Graeme Duffy

  Wheezer
• 
  Ted Atherton

  Edward 'Ed' Dewitt

• 
  Panou

  locotenent Lewis Crane
• 
  Andre Braugher

  generalul George W. Mancheck
• 
  Jonathan Potts

  Pat Terrence
• 
  Teach Grant
• 
  Kurt Max Runte

  şeriful Martin Willis
• 
  Paul Perri

  dr. Smithson
• 
  Ricky Schroder

  maiorul Bill Keane MD
• 
  Daniel Bacon

  purtător de cuvânt
• 
  Biski Gugushe

  sergent George
• 
  Bruno Verdoni

  reporter
• 
  Eve Harlow

  Leila
• 
  Tom McBeath

  Kyle Tobler
• 
  Eric Breker
• 
  Shaine Jones

  sergent Samuel 'Gunner' Wilson
• 
  Juan Carlos Velis

  Roach
• 
  Ian Thompson
• 
  Fred Keating

  Charles Henderson
• 
  Barry Flatman

  Charles 'Chuck' Beeter
• 
  Anna Galvin

  Lisa Stone
• 
  Matthew Smalley

  Brooks
• 
  Roman Podhora

  generalul Blair
• 
  Douglas O'Keeffe
• 
  David Ross

  Hank Benedict
• 
  Tom Butler

  colonelul Scott Arnold
• 
  Adrian Holmes

  Sam Barton
• 
  Jesse Moss

  Jeff Megan
• 
  Ted Whittall

  preşedintele William J. Scott
• 
  Cory Dagg

   General Michaelson (3 episodes, 2008)
• 
  Denise Galik

   Annie Dillon (3 episodes, 2008)
• 
  Emily Holmes

   Joanne Scott (3 episodes, 2008)
• 
  Michal Suchánek

  Lance Stone
• 
  Nicola Anderson

   Lt. Amy Deacon (2 episodes, 2008)
• 
  Ava Salomon

   Sarah Scott (3 episodes, 2008)