- Kathleen Munroe - Amanda Perry
- Tygh Runyan - Robert Caine
- Reiko Aylesworth - Sharon Walker
- Carlo Rota - Carl Strom
- Richard Dean Anderson - Jack O'Neill
- Agam Darshi - Dr. Sonja Damji
- Bradley Stryker - Curtis
- Christopher McDonald - Alan Armstrong
- Michael Shanks - Daniel Jackson
- Amanda Tapping - Samantha Carter
- Gary Jones - Walter Harriman
- Ona Grauer - Emily Young
- Ming-Na Wen - Camille Wray
- Peter Kelamis - Adam Brody
- Haley Beauchamp - Female Airman
- Jennifer Spence - Lisa Park
- Lou Diamond Phillips - David Telford
- Andrew Dunbar - Marine Cpl. Gorman
- Julia Benson - Vanessa James
- Haig Sutherland - Hunter Riley
- Bill Dow - Dr. Bill Lee
- Bill Dow - Bill Lee
- Patrick Gilmore - Dale Volker
- Anna Galvin - Mrs. Armstrong
- Suleka Mathew - Constance
- Alisen Down - Dr. Brightman
- Louise Lombard - Gloria Rush
- Rhona Mitra - Commander Kiva
- Mike Dopud - Varro
- Julie McNiven - Ginn
- Robert Knepper - Simeon
- Glynis Davies - Maryann Wallace
- Kathleen Quinlan - Senator Michaels
- Sarah Smyth - Annie Balic
- Vincent Gale - Morrison
- Katie Findlay - Ellie
- Victor Garber - Ambassador Ovirda
- Jim K. Chan - Dr. Simms
- David Hewlett - Rodney McKay
- Robert Picardo - Richard Woolsey
- August Schellenberg - Yaozu
- Marisa Emma Smith - Female Airman
- Catherine Lough Haggquist - Mary
- Reilly Dolman - Jason
- Shauna Johannesen - Sara
- Nicole Rockmann - Tenara Citizen (uncredited)
- Mark Burgess - Dr. Jeremy Franklin
- Martin Christopher - Major Kevin Marks
- Christina Schild - Andrea Palmer
- Michael Lenic - Eli's Friend
- Timothy Webber - Priest
- Josh Blacker - Marine Sgt. Spencer
- Josh Blacker - Sgt. Spencer
- Sandy Sidhu - Dr. Mehta
- Mar Andersons - Major Green
- Michael Karl Richards - Major Peterson
- Peter DeLuise - Peter
- Dominic Zamprogna - Dr. Boone
- Ryan Kennedy - Dr. Williams
- Janelle Monáe - Self
- Alana Husband - Dr. McCormack
- Sarah Mutch - Celina
- Carlo Marks - Andy
- Raquel Riskin - Mindy
- Kerry James - Josh
- Ryan Jefferson Booth - Cpl. Marsden
- Kyle Horton - Airman
- Zak Santiago - Cpl. Rivers
- Gordon Grice - Matt Balic
- Josette Jorge - Dr. Fisher
- Ronald Patrick Thompson - Airman Rennie
- Rukiya Bernard - Airman Richmond
- Darcy Laurie - Airman Dunning
- Chad Krowchuk - Student
- Ron Halder - Priest
- Jasmine Chan - Little Girl
- Jeffrey Bowyer-Chapman - Pvt. Darren Becker
- Jeffrey Bowyer-Chapman - Darren Becker
- Jeffrey Bowyer-Chapman - Private Darren Becker
- Sean Blakemore - Reginald Greer
- William MacDonald - Virgil Biggs
- Stefanie Samuels - Angela Greer
- Leanne Adachi - Cpl. Barnes
- Ian Butcher - Dannic
- John Murphy - Olan
- Kathryn Kirkpatrick - Bank Employee
- Sean Carey - Guard
- Kirby Morrow - Bridge Officer
- Patricia Cullen - Lucian Scientist
- Primo Allon - Koz
- Ilan Muallem - Squad Member
- Conan Graham - Calvos
- Ken Tran - Chen
- Caroline Cave - Dana
- Trevor Carroll - Sgt. Graham
- Trevor Carroll - Staff Sgt. Graham
- Tobias Slezak - Peter
- Rob Hayter - Alliance Soldier
- Ash Lee - Alliance Tech
- Elfina Luk - Marine
- Mittita Barber - Movie Chloe
- Camille Sullivan - Val
- Michelle Harrison - Rachel
- Jacob Blair - Cpl. Baras
- Dan Pelchat - Twinning Double
- Morgan David Jones - Airman Evans
- Troy Mundle - S.F. Sergeant Hyatt
- Brian McCaig - Geiger Counter Tech
- Daren A. Herbert - Captain
- John Shaw - Administrator
- Adam Thomas - Airman
- Jackie Blackmore - Worker
- Greyston Holt - Corporal Reynolds
- Kyra Zagorsky - Tasia
- Christina Jastrzembska - Betty
- Shaughnessy Redden - Steven
- Lane Edwards - Matthew Wallace
- Robert C. Cooper
- John G. Lenic
- Brad Wright
- Carl Binder
Christopher McDonald interpreta a Alan Armstrong en la serie.
Robert Carlyle interpreta a Nicholas Rush en la serie.
Louis Ferreira hace el papel de Everett Young.
David Blue interpreta a Eli Wallace en la serie.
Elyse Levesque interpreta a Chloe Armstrong en la serie.
Brian J. Smith interpreta a Matthew Scott en la serie.
Alaina Huffman interpreta a Tamara Johansen en la serie.
Jamil Walker Smith hace el papel de Ronald Greer.
Capítulo disponible en las siguientes plataformas:
