- Alex Carter
- Â Dr. Solomon Zond 13 episodes, 2003-2004
- Ryan Merriman
- Â Nikko Zond 13 episodes, 2003-2004
- Cobie Smulders
- Â Juliet Droil 13 episodes, 2003-2004
- Eric Balfour
- Â Calvin Banks 13 episodes, 2003-2004
- Cynthia Martells
- Â Maggie Hayes 13 episodes, 2003-2004
- Arnold Vosloo
- Â Vincent Siminou 13 episodes, 2003-2004
- Aidan Devine
- Â Tollan / ... 6 episodes, 2003
- Marybeth Massett
- Â Haley Cayce / ... 4 episodes, 2003-2004
- Roger Rees
- Â De Molay 2 episodes, 2003
- Sergei Nikolich
- Â Mengo / ... 2 episodes, 2003-2004
- Max Morrow
- Â Young Nikko / ... 2 episodes, 2003
- Farzad Sadrian
- Â Ali / ... 2 episodes, 2003
- Eli Wallach
- Â Rabbi 1 episode, 2003
- Lindy Booth
- Â Fiona Keiran 1 episode, 2003
- Liz Vassey
- Â Bella Nicholson 1 episode, 2003
- Carlo Rota
- Â Ali Hassan Rif 1 episode, 2003
- Tamara Gorski
- Â Sylvie 1 episode, 2003
- Michael Riley
- Â Robert Fraser 1 episode, 2003
- Aki Aleong
- Â Gyatso 1 episode, 2003
- Michael Kanevsky
- Â Alexi 1 episode, 2003
- Amy Goddard
- Â Connie Wiles 1 episode, 2003
- Raoul Max Trujillo
- Â Ramiro 1 episode, 2003
- Zach Grenier
- Â Hossik 1 episode, 2003
- Alan Van Sprang
- Â Javier 1 episode, 2003
- Paul Essiembre
- Â Cordova 1 episode, 2003
- Richard Cox
- Â Cosimo Medici 1 episode, 2003
- Kirsten Bishop
- Â Deputy Keiran 1 episode, 2003
- Robert 'Toshi' Kar Yuen Chan
- Â Lin 1 episode, 2003
- Audrey Gardiner
- Â Esther 1 episode, 2003
- Russell Yuen
- Â Batu 1 episode, 2004
- Diego Klattenhoff
- Â Tymus 1 episode, 2003
- Derek de Lint
- Â Head Gray Man 1 episode, 2003
- Daniel Kash
- Â Marshall Franklin 1 episode, 2003
- Salvatore Antonio
- Â Professor Ruiz 1 episode, 2003
- Cedric Smith
- Â Willie Anderson 1 episode, 2003
- Sarah Manninen
- Â Sophie St. John 1 episode, 2003
- Conrad Dunn
- Â Moondawg 1 episode, 2003
- Richard Chevolleau
- Â Costa 1 episode, 2003
- Henry Chan
- Â High Lama 1 episode, 2003
- Michael Rhoades
- Â Shaw 1 episode, 2004
- Jane McLean Guerra
- Â Lena 1 episode, 2003
- John Bourgeois
- Â Glen Fallon 1 episode, 2003
- Damon D'Oliveira
- Â Rico Gueverra 1 episode, 2003
- Alan Tang
- Â Chinese Soldier #1 1 episode, 2003
- Trent McMullen
- Â Grayson Winthrop Knox 1 episode, 2003
- Colin Glazer
- Â Ben 1 episode, 2003
- Mo Kelso
- Â Isabelle 1 episode, 2003
- Gage Knox
- Â Young Jacques de Molay 1 episode, 2003
- Malcolm Xerxes
- Â Military Patrolman 1 episode, 2003
- Hakan Coskuner
- Â Assailant / ... 1 episode, 2003
- Pawan Bansal
- Â Warlord 1 episode, 2003
- Paula Brancati
- Â Young Hayley 1 episode, 2004
- George Buza
- Â Myrth 1 episode, 2003
- Lisa Marcos
- Â Vanessa 1 episode, 2003
- Michael Copeman
- Â Leonardo Da Vinci 1 episode, 2003
- Sugith Varughese
- Â Auctioneer 1 episode, 2003
- Michael Zelniker
- Â Isaac 1 episode, 2003
- Daniel Junghuan Park
- Â Chinese Soldier #2 1 episode, 2003
- Deanna Dezmari
- Â Female Technician 1 episode, 2003
- Tauqir Shah
- Â Servant 1 episode, 2003
- Adam Brooks
- Â First Knight 1 episode, 2003
- Jovanni Sy
- Â Ateevan 1 episode, 2004
- Matt Baram
- Â Hiam 1 episode, 2003
- Matt Cooke
- Â Sheriff Coyne 1 episode, 2003
- Brendan Wall
- Â Security Chief 1 episode, 2003
- James Kim
- Â Guard 1 episode, 2003
- Kelly King
- Â Woman at Auction 1 episode, 2003
- Raymond O'Neill
- Â Jean De Molay 1 episode, 2003
- Sevag Sagherain
- Â Limo Driver 1 episode, 2003
- Tig Fong
- Â Diamond Tooth 1 episode, 2004
- Ennis Esmer
- Â Eguptian Guard 1 episode, 2003
- Cas Anvar
- Â Mikhail 1 episode, 2003
- Vladimir Jon Cubrt
- Â Computer Operative 1 episode, 2003
- Hamish McEwan
- Â Deshaies 1 episode, 2003
- Liz Gordon
- Â Librarian 1 episode, 2003
- Rod Campbell
- Â Mortician 1 episode, 2003
- Carl Barlow
- Â Grey Man 1 episode, 2003
- Noah Dalton Danby
- Â Scott 1 episode, 2003
- Scott Wickware
- Â Manager 1 episode, 2003
- John Kozak
- Â Doctor 1 episode, 2003
- Barry Baldaro
- Â Dr. Bradley 1 episode, 2003
- Stefen Rollpiller
- Â German Thug 1 episode, 2003
- Jon Granik
- Â Old Priest 1 episode, 2003
- Eddie Tri Wong
- Â Urban Warlord 1 episode, 2004
- Stefen Hayes
- Â Border Guard 1 episode, 2003
- Jean Faubert
- Â Lafluer 1 episode, 2003
- Fionnuala Jamison
- Â Woman Citizen 1 episode, 2003
- Ellis Turner
- Â Estrella 1 episode, 2003
- Jody Ferrer
- Â Young Batu 1 episode, 2004
- Milton Barnes
- Â Colby 1 episode, 2003
- Jasson Finney
- Â Hossik's Thug #1 1 episode, 2003
- Kendall Knights
- Â Sergeant 1 episode, 2003
- Anna Solo
- Â Irma 1 episode, 2003
- Gregory Misumi
- Â Ancient Tungus 1 episode, 2004
- Kwasi Songui
- Â Club Bouncer 1 episode, 2003
- Siluck Saysanasy
- Â Doctor 1 episode, 2003
- Darren Marsman
- Â Corporal 1 episode, 2003
- Vladimir Radian
- Â Bishop 1 episode, 2003
- Tommy Chang
- Â Tungas Warrior #1 1 episode, 2004
- Philippe Wéris
- Â Grey Man No. 1 1 episode, 2003
- Rafal Sokolowski
- Â Villager 1 episode, 2003
- James Kong
- Â Tungus Warrior #2 1 episode, 2004
- Derek Bujalski
- Â Ukrainian Soldier 1 episode, 2003
- Jere Gillis
- Â Grey Driver 1 episode, 2003
- Oscar Hsu
- Â Prison Commandant 1 episode, 2003
- Clipper Miano
- Â Young Lin 1 episode, 2003
- Jeffrey James
- Â Young Vincent 1 episode, 2003
- Karis Han
- Â Tibetan Boy 1 episode, 2003
- Alexis Green
- Â Ball attendee / ... 1 episode, 2003
- Gillian Ferrabee
- Â Club Waitress (uncredited) 1 episode, 2003
- Alain Bérard
- Â Hossik Driver (uncredited) 1 episode, 2003
- Alexis Jolis-Désautels
- Â Scooter Owner (uncredited) 1 episode, 2003