- Colin Ferguson
- Â Jack Carter 77 episodes, 2006-2012
- Salli Richardson-Whitfield
- Â Allison Blake 77 episodes, 2006-2012
- Erica Cerra
- Â Jo Lupo 77 episodes, 2006-2012
- Neil Grayston
- Â Douglas Fargo / ... 77 episodes, 2006-2012
- Joe Morton
- Â Henry Deacon 76 episodes, 2006-2012
- Chris Gauthier
- Â Vincent / ... 67 episodes, 2006-2012
- Jordan Danger
- Â Zoe Carter 50 episodes, 2006-2012
- Niall Matter
- Â Zane Donovan 49 episodes, 2007-2012
- Ed Quinn
- Â Nathan Stark 31 episodes, 2006-2012
- Debrah Farentino
- Â Beverly Barlowe 24 episodes, 2006-2012
- Tembi Locke
- Â Grace Monroe 24 episodes, 2010-2012
- Christopher Jacot
- Â Larry Haberman 23 episodes, 2007-2012
- Kavan Smith
- Â Deputy Andy 2.0 / ... 21 episodes, 2010-2012
- Felicia Day
- Â Holly Marten 18 episodes, 2011-2012
- Matt Frewer
- Â Jim Taggart 18 episodes, 2006-2012
- Trevor Jackson
- Â Kevin Blake 16 episodes, 2010-2012
- Jaime Ray Newman
- Â Tess Fontana 12 episodes, 2009-2010
- Vanya Asher
- Â Lucas 12 episodes, 2007-2009
- Wil Wheaton
- Â Isaac Parrish 12 episodes, 2010-2012
- James Callis
- Â Dr. Trevor Grant / ... 10 episodes, 2010-2012
- Meshach Peters
- Â Kevin Blake 10 episodes, 2006-2008
- Frances Fisher
- Â Eva Thorne 8 episodes, 2008-2009
- Ever Carradine
- Â Lexi Carter 8 episodes, 2008-2009
- Barclay Hope
- Â Gen. Mansfield 8 episodes, 2007-2010
- Ming-Na Wen
- Â U.S. Senator Michaela Wen 7 episodes, 2011-2012
- Shayn Solberg
- Â Spencer Martin 7 episodes, 2006-2009
- Adrienne Carter
- Â Pilar 6 episodes, 2007-2010
- Jackie Gonneau
- Â Computer Voice / ... 6 episodes, 2011-2012
- Bryan Wilson
- Â Baker Twin #2 / ... 6 episodes, 2006-2012
- Keith Wilson
- Â Baker Twin #1 / ... 6 episodes, 2006-2012
- Tamlyn Tomita
- Â Kim Anderson / ... 5 episodes, 2006-2009
- Wesley Salter
- Â Technician / ... 5 episodes, 2010-2012
- Bridget Hoffman
- Â Computer Voice / ... 5 episodes, 2008-2009
- Martin Cummins
- Â Dekker 4 episodes, 2011-2012
- Jordenn Thompson
- Â Jenna / ... 4 episodes, 2012
- Paula Lindberg
- Â Neural Engineer #1 / ... 4 episodes, 2011-2012
- Roger Cross
- Â Major William Shaw 3 episodes, 2012
- Sonja Bennett
- Â Callie Curie 3 episodes, 2007
- Alan Legros
- Â Seth Osbourne 3 episodes, 2006-2009
- Wallace Shawn
- Â Dr. Warren Hughes 3 episodes, 2011-2012
- Nevaeh Kidd
- Â Jenna Blake 3 episodes, 2011-2012
- Elias Toufexis
- Â Adam Barlowe 3 episodes, 2010
- Martin Christopher
- Â Doctor / ... 3 episodes, 2007-2009
- Leo Chiang
- Â GD Section 5 Guard / ... 3 episodes, 2011-2012
- Olivia d'Abo
- Â Dr. Abby Carter 2 episodes, 2007
- Chris Parnell
- Â Dr. Noah Drummer 2 episodes, 2010-2011
- Ty Olsson
- Â Deputy Andy / ... 2 episodes, 2009-2010
- Leela Savasta
- Â Julia Golden 2 episodes, 2009
- Jeff Pangman
- Â Duncan 2 episodes, 2009
- Noah Dalton Danby
- Â Major Ryan 2 episodes, 2010
- Craig Anderson
- Â Dr. Nick Fowler 2 episodes, 2012
- Garwin Sanford
- Â Congressman Faraday 2 episodes, 2006-2007
- Rob LaBelle
- Â Walter Perkins 2 episodes, 2006
- Robert Clarke
- Â Larry the IT Guy 2 episodes, 2006
- Lexa Doig
- Â Dr. Anne Young 2 episodes, 2007-2008
- Jennifer Clement
- Â Susan Perkins 2 episodes, 2006
- Gabrielle Rose
- Â Carol Taylor 2 episodes, 2007-2008
- Kim Poirier
- Â Dr. Maria Leonardo 2 episodes, 2009-2011
- Michael Brock
- Â Jasper Cole 2 episodes, 2007
- Ben Immanuel
- Â Dr. Fung 2 episodes, 2011-2012
- Paul Moniz de Sa
- Â Lincoln 2 episodes, 2007-2008
- Andrew Cownden
- Â Chem Tech / ... 2 episodes, 2009-2012
- Alex Ferris
- Â Boy / ... 2 episodes, 2010-2011
- Zak Ludwig
- Â Brian Perkins 2 episodes, 2006
- Marie West
- Â Singer 2 episodes, 2010
- Raugi Yu
- Â GD Tech / ... 2 episodes, 2007-2010
- Michael Kopsa
- Â Doctor 2 episodes, 2007
- Karissa Tynes
- Â Stephanie 2 episodes, 2007
- Paul Lazenby
- Â MP / ... 2 episodes, 2010
- Isaiah Adam
- Â Soldier / ... 2 episodes, 2010
- Sharon Taylor
- Â Stark's Doctor / ... 2 episodes, 2007
- Cameron Park
- Â Doctor / ... 2 episodes, 2007
- Rif Hutton
- Â Astraeus Computer / ... 2 episodes, 2011-2012
- Ileeya Brown
- Â Jenna 2 episodes, 2012
- Jocelyne Loewen
- Â Doris Gilmer / ... 1 episode, 2006
- Christina Sicoli
- Â Desperate Citizen / ... 1 episode, 2011-2012
- Nico Cortez
- Â Jo's Dad 2 episodes, 2011-2012
- Greg Germann
- Â Professor Warren King 1 episode, 2006
- Billy Campbell
- Â Dr. Bruce Manlius 1 episode, 2009
- Antony Holland
- Â Dr. Irvin Thatcher 1 episode, 2006
- Tygh Runyan
- Â Pierre Fargo 1 episode, 2007
- Richard Side
- Â Dr. Kinnison 1 episode, 2009
- Allison Scagliotti
- Â Claudia Donovan 1 episode, 2010
- Stan Lee
- Â Dr. (Generalissimo) Lee 1 episode, 2011
- Dondré T. Whitfield
- Â Dr. Marcus Blake 1 episode, 2012
- David Paetkau
- Â Callister Raynes 1 episode, 2006
- Andrew Airlie
- Â Jason Anderson 1 episode, 2006
- Teryl Rothery
- Â Diane Lancaster 1 episode, 2007
- Anna Galvin
- Â Dr. Jane Harrington 1 episode, 2007
- Vincent Gale
- Â Dr. Todd 1 episode, 2007
- Scott Hylands
- Â Andre Sandrov 1 episode, 2007
- Alan Ruck
- Â Dr. Hood 1 episode, 2008
- Jillian Fargey
- Â Dr. Ashe 1 episode, 2009
- Ben Geldreich
- Â Dr. Lieber 1 episode, 2009
- Eugene Byrd
- Â Dr. Michael Clark 1 episode, 2012
- Saul Rubinek
- Â Dr. Carl Carlson 1 episode, 2006
- Michael Coleman
- Â Pizza Dude 1 episode, 2006
- Donna White
- Â Eugenia 1 episode, 2006
- Tom Tames
- Â Dylan Hartwell 1 episode, 2006
- Michael Shanks
- Â Christopher Dactylos 1 episode, 2007
- Patrick Gilmore
- Â Pete Puhlman 1 episode, 2007
- Elise Gatien
- Â Megan 1 episode, 2007
- Allison Hossack
- Â Dr. Emily Glenn 1 episode, 2007
- Laura Mennell
- Â Dr. Rivers 1 episode, 2009
- Glynis Davies
- Â Toaster Owner 1 episode, 2009
- Brendan Beiser
- Â Dr. Drechmeyer 1 episode, 2009
- Eric Hempsall
- Â Dr. Wyman 1 episode, 2009
- Aaron Douglas
- Â Dr. Ray Darlton 1 episode, 2011
- Donavon Stinson
- Â Dr. Max Dillon 1 episode, 2011
- Maury Chaykin
- Â Major William Cobb / ... 1 episode, 2006
- Samuel Patrick Chu
- Â Putnam 1 episode, 2006
- David Quinlan
- Â Dr. Milton Houk 1 episode, 2006
- Arthur Corber
- Â Scientist in Explosion 1 episode, 2006
- Stefanie von Pfetten
- Â Wendy Whiticus 1 episode, 2007
- Barbara Eve Harris
- Â Reverend Harper 1 episode, 2007
- Terence Kelly
- Â Charlie 1 episode, 2007
- Fulvio Cecere
- Â Jake Wyatt 1 episode, 2007
- Bill Mondy
- Â Sam Lovejoy 1 episode, 2007
- Syn Narula
- Â Dr. Babajanian 1 episode, 2007
- Holly Elissa
- Â Dr. Tracy Fox 1 episode, 2008
- Nicholas Carella
- Â Leo Weinbrenner 1 episode, 2008
- Chelah Horsdal
- Â Mary-Beth Curtis 1 episode, 2009
- Sean Owen Roberts
- Â Toby Bismarck 1 episode, 2009
- Tobias Slezak
- Â Dr. Jacob Stefano 1 episode, 2009
- Stefanie Samuels
- Â Dr. Draper 1 episode, 2009
- Olivia Cheng
- Â Dr. Lisa Wheeler 1 episode, 2010
- Jim Parsons
- Â Carl the Jeep 1 episode, 2011
- Andrew McNee
- Â Huggins 1 episode, 2011
- Rocky Anderson
- Â Helicopter Pilot 1 episode, 2011
- Aliyah O'Brien
- Â Female Driver 1 episode, 2012
- Forbes Angus
- Â Dr. Selikoff 1 episode, 2012
- Rukiya Bernard
- Â IT Technician 1 episode, 2006
- Michael Benyaer
- Â Dr. Louis Glazer 1 episode, 2006
- Colin Foo
- Â Scientist Teaching Zoe #1 1 episode, 2006
- Aaron Isaacs
- Â Walter Perkins 1 episode, 2006
- Ryan Vrba
- Â Puck 1 episode, 2006
- Colin Cunningham
- Â Dr. Paul Suenos 1 episode, 2007
- David James Lewis
- Â Dr. Aaron Finn 1 episode, 2007
- David Nykl
- Â Dr. Steven Whiticus 1 episode, 2007
- Don Thompson
- Â Victor 1 episode, 2007
- Ed Hong-Louie
- Â Man at Bar 1 episode, 2007
- Deirdre Blades
- Â Belle St. John 1 episode, 2007
- Elysia Rotaru
- Â Teri Wallace 1 episode, 2008
- Mark Hildreth
- Â Chuck 1 episode, 2008
- Zak Santiago
- Â Dr. Sebastian Marx 1 episode, 2008
- Jonathon Young
- Â Dr. Ethan Edison 1 episode, 2008
- Dean Marshall
- Â Dr. Herrera 1 episode, 2008
- Jennifer Spence
- Â Dr. Monroe 1 episode, 2009
- Jay Brazeau
- Â Captain Yuri Gregor 1 episode, 2009
- Jennifer Crystal Foley
- Â Tabitha 1 episode, 2009
- Julia Arkos
- Â Dr. Bella Pagani 1 episode, 2009
- Mark Gash
- Â H.J. Johnson 1 episode, 2009
- Keegan Connor Tracy
- Â Dr. Viccelli 1 episode, 2010
- Edward James Olmos
- Â Rudy the Lead Sled Dog 1 episode, 2011
- Quinn Lord
- Â Young Zane 1 episode, 2011
- Graeme Duffy
- Â Dr. Norman Gregor 1 episode, 2011
- Debbie Timuss
- Â Officer 1 episode, 2011
- Revard Dufresne
- Â Guard 1 episode, 2012
- Aleks Paunovic
- Â Global Security Officer 1 episode, 2006
- Garry Chalk
- Â Colonel Briggs 1 episode, 2006
- Layla Alizada
- Â Dr. Sharat 1 episode, 2006
- Amber Borycki
- Â Cybernetic Fairy 1 episode, 2006
- Sean Devine
- Â Bus Driver 1 episode, 2006
- Gary Sekhon
- Â Kellor 1 episode, 2006
- Yvonne Myers
- Â Global Dynamics Human Resource Counselor 1 episode, 2006
- John Burnside
- Â Scientist Teaching Zoe #2 1 episode, 2006
- Carmen Moore
- Â Dr. Childress 1 episode, 2007
- Brenda Crichlow
- Â Principal Wallace 1 episode, 2007
- Eileen Barrett
- Â Judy Stone 1 episode, 2007
- Adam Bergquist
- Â Mr. Hall 1 episode, 2007
- Lauren K. Robek
- Â Mina 1 episode, 2008
- Adrian Hough
- Â Dr. Wilding 1 episode, 2008
- David Richmond-Peck
- Â Dr. Hendricks 1 episode, 2008
- Richard Kahan
- Â Derek Bowers 1 episode, 2008
- Margot Berner
- Â Kylie 1 episode, 2008
- Meredith McGeachie
- Â Dr. Bell 1 episode, 2009
- Darryl Scheelar
- Â Ranger Tom 1 episode, 2009
- Jonathan Nichols-Navarro
- Â Announcer 1 episode, 2009
- Kevin Kruchkywich
- Â Dr. Fielding 1 episode, 2009
- John Reardon
- Â Dr. Derek Thergood 1 episode, 2010
- Michelle Harrison
- Â Lily Morgan 1 episode, 2010
- Benjamin Wilkinson
- Â Dr. Anson 1 episode, 2010
- Ava Hughes
- Â Girl 1 episode, 2010
- Dave Foley
- Â Dr. Plotkin 1 episode, 2011
- Cameron Bancroft
- Â Dad 1 episode, 2011
- Ellie Harvie
- Â Dr. Sanagustin 1 episode, 2011
- Luke Camilleri
- Â Dr. Welke 1 episode, 2011
- Fane Tse
- Â Candidate #1 1 episode, 2011
- Natalie Gibson
- Â Panicked Patron 1 episode, 2011
- Pablo Silveira
- Â Tech #2 1 episode, 2011
- Burke Jurjaks
- Â Young Fargo 1 episode, 2011
- Erin Simms
- Â Young Scientist 1 episode, 2012
- John Paul McGlynn
- Â Med Tech 1 episode, 2012
- Daryl Shuttleworth
- Â Global Security Tactical Commander 1 episode, 2006
- Randal Edwards
- Â Lab Tech 1 episode, 2006
- Mark Burgess
- Â Man Getting Ticket 1 episode, 2006
- Kenneth W. Yanko
- Â Lt. General 1 episode, 2006
- Richard Ian Cox
- Â Dr. Bob Stone 1 episode, 2007
- Matreya Fedor
- Â Tina 1 episode, 2007
- Kevin O'Grady
- Â Technician 1 episode, 2007
- James Ashcroft
- Â Male Nurse 1 episode, 2007
- Steve Makaj
- Â Rudolph 1 episode, 2007
- Sarah Hayward
- Â Madame 1 episode, 2007
- Paul Christie
- Â Dr. Ryan Brock 1 episode, 2007
- Malcolm Stewart
- Â Rick Wallace 1 episode, 2008
- Jody Racicot
- Â Doctor Peterson 1 episode, 2008
- Shawn Macdonald
- Â Dr. Mendel 1 episode, 2008
- Tricia Collins
- Â Eileen Michaels 1 episode, 2008
- Julius Chapple
- Â Guard 1 episode, 2008
- John DeSantis
- Â Big Ed 1 episode, 2009
- D. Harlan Cutshall
- Â GD Demo Team Leader 1 episode, 2009
- Rachel Gassi
- Â The Dress Lady 1 episode, 2009
- Jamie Kennedy
- Â Dr. Ramsey 1 episode, 2010
- Jill Morrison
- Â Supply Clerk 1 episode, 2010
- Stephanie Belding
- Â Dr. Tanya Zimmer 1 episode, 2010
- Stacee Copeland
- Â GD Nurse 1 episode, 2010
- Kathryn Kirkpatrick
- Â Patient 1 episode, 2010
- Norman Misura
- Â Irate Customer 1 episode, 2010
- Matthew Thiessen
- Â Scientist #1 1 episode, 2010
- Nicholas Elia
- Â Young Parrish 1 episode, 2011
- Darren Dolynski
- Â Dr. Boyle 1 episode, 2011
- Sunita Prasad
- Â Boxed Hand Tech 1 episode, 2012
- C. Douglas Quan
- Â Dr. Horikoshi 1 episode, 2012
- Andrew Coghlan
- Â Grief Tech #1 1 episode, 2012
- Justin Kim
- Â Medic 1 episode, 2012
- J.R. Messado
- Â Kevin Blake 1 episode, 2006
- Rob Hayter
- Â FBI Agent #2 1 episode, 2007
- Sean Millington
- Â Global Security Officer 1 episode, 2007
- Michael Bean
- Â Husband 1 episode, 2007
- Iris Paluly
- Â Home Owner 1 episode, 2007
- Maria Luisa Cianni
- Â Miss Nelson 1 episode, 2007
- Woody Jeffreys
- Â Bob Nobb 1 episode, 2008
- Kayla Deorksen
- Â Sales Lady 1 episode, 2008
- David Mackay
- Â Doctor Gaz 1 episode, 2008
- Kurt Max Runte
- Â Agent Turner 1 episode, 2009
- Stacey Bendfelt
- Â GD Gym Manager 1 episode, 2009
- Fiona Vroom
- Â GD Employee 1 episode, 2010
- Kameron Louangxay
- Â Scientist #2 1 episode, 2010
- Marie Avgeropoulos
- Â Bonnie 1 episode, 2011
- Peter Kelamis
- Â Dr. Mark Timmons 1 episode, 2011
- Patricia Isaac
- Â Med Tech 1 episode, 2012
- Peter Ciuffa
- Â Grief Tech #2 1 episode, 2012
- Jeffrey Kaiser
- Â GD Tech NPC 1 episode, 2012
- Laura Adkin
- Â Cheerleader #1 1 episode, 2006
- Alison Araya
- Â Parishioner 1 episode, 2007
- Lossen Chambers
- Â Nurse 1 episode, 2007
- Paul Herbert
- Â Epigeneticist 1 episode, 2007
- Max Fomitchev
- Â Neil Baxter 1 episode, 2007
- Daniel Pepper
- Â D.O.D. Agent 1 episode, 2007
- Eric Hui
- Â Medical Doctor 1 episode, 2007
- Kaaren de Zilva
- Â Doctor Lee 1 episode, 2008
- Jax Smith
- Â Grace 1 episode, 2008
- Keenan Tracey
- Â Jake 1 episode, 2010
- Dalias Blake
- Â Construction Worker #1 1 episode, 2010
- Don Hastings
- Â Baseball Game Announcer 1 episode, 2010
- Phillip Mitchell
- Â Soldier #1 1 episode, 2010
- Chad Bellamy
- Â GD Guard - Frank 1 episode, 2010
- Alex Hospes
- Â Cookie Eating Boy 1 episode, 2010
- Max Boateng
- Â Nurse 1 episode, 2011
- Aubrey Tennant
- Â Balloon Man 1 episode, 2011
- Grant Imahara
- Â EMO Robot Scientist 1 episode, 2012
- Jason Poulsen
- Â Dr. Wells 1 episode, 2012
- Katie Chapman
- Â Cheerleader #2 1 episode, 2006
- Reese Alexander
- Â Security Officer 1 episode, 2007
- David Stuart
- Â Pharmacist 1 episode, 2007
- Dorla Bell
- Â Zoe's Friend #3 1 episode, 2007
- Neil Schell
- Â Abe 1 episode, 2008
- Jerry Rector
- Â Construction Worker #2 1 episode, 2010
- Joel Semande
- Â Male Student 1 episode, 2010
- Bella King
- Â Jessica Lansky 1 episode, 2010
- Blaine Anderson
- Â Candidate 1 episode, 2011
- Tammy Hui
- Â Teacher 1 episode, 2011
- Dan Clarke
- Â Faux-Bama 1 episode, 2011
- Elizabeth Thai
- Â Dr. Yoo 1 episode, 2012
- Jonathan Holmes
- Â Consortium #1 1 episode, 2012
- Troy Rudolph
- Â Crewman Tuchman 1 episode, 2012
- Demord Dann
- Â GD Guard NPC 1 episode, 2012
- Benjamin B. Smith
- Â Oppenheimer 1 episode, 2006
- Matt McInnis
- Â Young Thatcher 1 episode, 2006
- Anna Cummer
- Â EMT Nurse 1 episode, 2007
- Dave Leach
- Â Marco Polo #1 1 episode, 2007
- Daniel Boileau
- Â Man Arguing with Wife 1 episode, 2007
- Patricia Harras
- Â Laura Wallace 1 episode, 2008
- Christie Burke
- Â College Girl 1 episode, 2010
- Harrison Xu
- Â Tesla Kid #1 1 episode, 2010
- Nickolas Baric
- Â MP #1 1 episode, 2010
- Finn Michael
- Â Scientist 1 episode, 2010
- Kevin Mundy
- Â Military Guard 1 episode, 2011
- Tina Milo Milivojevic
- Â Scientist #1 1 episode, 2011
- Geoff Gustafson
- Â Dr. Tuchman 1 episode, 2012
- Ian Carter
- Â Chief Marshal 1 episode, 2006
- Tyla Gagnon
- Â Young Eugenia 1 episode, 2006
- Nhi Do
- Â Zoe's Friend #2 1 episode, 2007
- Tanya Champoux
- Â Woman Arguing with Husband 1 episode, 2007
- Stephen Park
- Â Marco Polo #2 1 episode, 2007
- Aleksandra Rea
- Â Spa Attendant 1 episode, 2007
- J.B. McEown
- Â Kid in Park 1 episode, 2007
- Tiara Sorensen
- Â Sweater Girl 1 episode, 2010
- Jonathan Potts
- Â Dr. Curtis Ward 1 episode, 2011
- Todd Mason
- Â Scientist #2 1 episode, 2011
- Matthew Hastings
- Â Robert the Moving Boss 1 episode, 2012
- Sarah Afful
- Â Cop 1 episode, 2012
- Kwesi Ameyaw
- Â Special Agent Hicks 1 episode, 2006
- Aaron Rota
- Â Man In Yellow Shirt 1 episode, 2006
- Storma
- Â Media Store Clerk 1 episode, 2007
- Eddie Frierson
- Â Radio Announcer 1 episode, 2010
- Jessica Gonzales
- Â Young Jo 2 episodes, 2011-2012
- Christina Jastrzembska
- Â Old Woman 1 episode, 2012
- Leanne Merrett
- Â Special Agent Miller 1 episode, 2006
- Nancy J. Lilley
- Â Upset Wife 1 episode, 2007
- Chris Burns
- Â Buzz 1 episode, 2006
- Alison Raine
- Â Woman in Purple Sweater 1 episode, 2007
- Nico McEown
- Â Rico 1 episode, 2011
- Viv Leacock
- Â Array Guard #1 1 episode, 2012
- Tyler McClendon
- Â Young Corporal 1 episode, 2006
- Donna Yamamoto
- Â Woman Arguing with Friend 1 episode, 2007
- Peter Bundic
- Â Eddie 1 episode, 2011
- Jason Griffith
- Â Array Guard #2 1 episode, 2012
- Norm Sherry
- Â Section 5 Security Guard 1 episode, 2006
- Alexander Kambolis
- Â Juan 1 episode, 2011
- Kevin D. Murray
- Â Charley 1 episode, 2006
- Michelle Creber
- Â Radical Racoon Teammate 1 episode, 2011
- Michael Warren Choi
- Â Awesome Possum #1 1 episode, 2011
- Tessamay Hartley
- Â Awesome Possum #2 1 episode, 2011
- Alyssia Ellis
- Â Awesome Possum #3 1 episode, 2011
- Laura Jaye
- Â Woman 1 episode, 2007
- Chad Riley
- Â Guard 1 episode, 2008
- Heather Doerksen
- Â Woman #2 1 episode, 2009
- Nicholas Longstaff
- Â The Mail Carrier 1 episode, 2009
- Wanda Ayala
- Â Researcher 1 episode, 2009
- Seth Dusky
- Â Additional voices 1 episode, 2011
- Peter Brown
- Â Med Tech (uncredited) 9 episodes, 2012
- Damon Winters
- Â Field Scientist (uncredited) 2 episodes, 2011
- Sean Kohnke
- Â Researcher #1 (uncredited) 1 episode, 2006
- Chris Ang
- Â Interrogatee (uncredited) 1 episode, 2006
- Chris Becker
- Â Darren (uncredited) 1 episode, 2006
- Mike Vardy
- Â Lab Employee (uncredited) 1 episode, 2006
- Axe Pagode
- Â Restaurant Patron (uncredited) 1 episode, 2006
- Peter Sallis
- Â Guest (uncredited) 1 episode, 2007
- Winson Won
- Â Global Dynamics Reactor Tech (uncredited) 1 episode, 2007
- Bonnie Smart
- Â Female Tech (uncredited) 1 episode, 2007
- Jaime Paglia
- Â I.S.S. Crew (uncredited) 1 episode, 2011
- Sherry Nelson
- Â Towns person (uncredited) 1 episode, 2012
- Nathan Lehfeldt
-  DOD Attaché (uncredited) 1 episode, 2012