- Aaron Douglas - Galen Tyrol
- Michael Trucco - Samuel T. Anders
- Paul Campbell - Billy Keikeya
- Callum Keith Rennie - Leoben
- Alessandro Juliani - Felix Gaeta
- Alessandro Juliani - Lt. Felix Gaeta
- Kandyse McClure - Anastasia Dualla
- Kandyse McClure - Lt. Anastasia Dualla
- Dana Delany - Sesha Abinell
- Bruce Davison - Dr. Michael Robert
- Jerry Wasserman - Cabott
- Dorothy Lyman - Socrata Thrace
- Lucinda Jenney - Carolanne Adama
- Nana Visitor - Emily Kowalski
- Michelle Forbes - Admiral Helena Cain
- Connor Widdows - Boxey
- Warren Christie - Tarn
- Colm Feore - President Richard Adar
- Bill Duke - Phelan
- Gabrielle Rose - Mrs. King
- Chelah Horsdal - Didi Cassidy
- Fulvio Cecere - Lt. Alastair Thorne
- Jill Teed - Sgt. Hadrian
- Benjamin Ayres - Lt. George 'Catman' Birch
- Paul Perri - Royan Jahee
- John Heard - Commander Barry Garner
- Carl Lumbly - Lt. Danny 'Bulldog' Novacek
- Robert Wisden - Wallace Gray
- Holly Dignard - Asha Janik
- Eric Breker - Chu
- Kavan Smith - Lt. Richard 'Buster' Baier
- Roark Critchlow - Slick
- John Pyper-Ferguson - Captain Cole 'Stinger' Taylor
- Samantha Ferris - Pollux
- John Hodgman - Dr. Gerard
- Patrick Gallagher - Grimes
- David Richmond-Peck - Naylin Stans
- Claudette Mink - Shevon
- Terry Chen - Chuckles
- Graham Beckel - Colonel Jack Fisk
- Alex Zahara - Valance
- Stephen Spender - Pilot
- Brad Loree - Bonnington
- Nimet Kanji - Candace Myson
- Sonja Bennett - Specialist 2nd Class Marcie Brasko
- Adrien Dorval - Wilkens
- Ron Selmour - Seaborne
- Brent Stait - Mason
- Colby Johannson - Lt. Dwight 'Flat-Top' Saunders
- Shaw Madson - Marine Corporal
- Morris Chapdelaine - Reporter
- Nicholas Treeshin - Sgt. Watkins
- Lorena Gale - Elosha
- Jim Shield - Karma
- Alonso Oyarzun - Crewman Specialist Socinus
- Garvin Cross - Collishaw
- Kurt Evans - Paramedic Howard Kim
- Lori Stewart - Twinam
- Troy Everett - Marine
- Axel Green - Deckhand
- Jeremy Guilbaut - Lt. Joe 'Hammerhead' Palladino
- Curtis Ricks - Marine Sergeant
- Paul Cummings - Fireball
- Kevan Kase - Pvt. Scott Kelso
- Camille Sullivan - Stepchild
- Cailin Stadnyk - Ensign Davis
- Yee Jee Tso - Staffer
- Sam Witwer - Crashdown
- Chris Shields - Cpl. Venner
- Biski Gugushe - Reporter Sekou Hamilton
- Malcolm Stewart - Marshall Bagot
- James Remar - Meier
- James Ashcroft - Spectator
- James Ashcroft - Security Officer
- Michael Jonsson - Pegasus Guard
- Jennifer Kitchen - Marine
- Amy Lalonde - Gianne
- Haley Guiel - Paya
- John Mann - Linden
- Jamie Bell - ECO
- Jamie Bell - Lt. Steve 'Red Devil' Fleer
- Brad Mann - Pegasus Marine
- Gustavo Febres - Herbalist
- Christopher Jacot - Ensign Brent 'BB' Baxton
- Sean J. Dory - Ensign Joseph 'JoJo' Clark
- Mark Houghton - Vinson
- David Neale - Page
- Michael Ryan - Ray Abinell
- Adrian G. Griffiths - Lt. Terry Burrell
- Georgia Hacche - Petty Officer Sian
- Erica Carroll - Civilian
- James Upton - Environmental Specialist
- Stefanie von Pfetten - Cpt. Marcia 'Showboat' Case
- Aaron Pearl - Ensign Abel Thornton
- Tammy Hui - ECO Lyla 'Shark' Ellway
- Kurt Max Runte - Ensign Charles Bellamy
- Kimani Ray Smith - Pegasus Sergeant
- Amber Rothwell - Rya Kibby
- Patricia Idlette - Sarah Porter
- David Kaye - James McManus
- Erica Cerra - Maya
- Byron Lawson - Pilot
- Larissa Stadnichuk - Suicide Bomber
- Winston Rekert - Priest
- Nicki Clyne - Crewman Specialist Cally Henderson
- Nicki Clyne - Crewman Specialist Cally Tyrol
- Mylène Dinh-Robic - Officer
- Emilie Ullerup - Julia
- Amanda Plummer - Oracle
- Rachel Hayward - Blonde Woman
- Barry Kennedy - Admiral Corman
- Christian Tessier - Tucker 'Duck' Clellan
- Dominic Zamprogna - Jammer
- Luciana Carro - Louanne 'Kat' Katraine
- Luciana Carro - Captain Louanne 'Kat' Katraine
- Ian Rozylo - Pilot
- Aleks Paunovic - Marine Sgt. Omar Fischer
- Diego Diablo Del Mar - Hillard
- Tygh Runyan - Private Sykes
- Graeme Duffy - Adrien Bauer
- Tom Bower - Joe
- Scott Little - Willie King
- Aaron Brooks - Mr. Buckminster
- James Lafazanos - Civvie
- Eliza Norbury - Civvie
- Sebastian Spence - Lt. Noel 'Narcho' Allison
- Wesley Salter - Redford
- Bryce Hodgson - Danny Noon
- Samuel Patrick Chu - Milo
- Georgia Craig - Oracle Yolanda Brenn
- Steve Lawlor - Marine
- Steve Lawlor - Guard
- Camille Atebe - Sarah Ryan
- Tyler McClendon - Alan Hughes
- Chris Boyd - Cheadle
- Alison Matthews - Karen Fallbrook
- Stephen Holmes - Reporter
- Shaun Omaid - Shaunt
- Françoise Robertson - Woman
- Karen Austin - Lilly
- Jen Halley - Ensign Diana 'Hardball' Seelix
- Jen Halley - Crewman Specialist Diana Seelix
- Hector Johnson - Marine Lieutenant
- Eileen Pedde - Sgt. Erin Mathias
- Lori Triolo - Phoebe
- Alisen Down - Jean Barolay
- Laara Sadiq - Priestess
- Alana Husband - Nurse Sashon
- Ryan McDonell - Lt. Eammon 'Gonzo' Pike
- Richard Hatch - Tom Zarek
- Heather Doerksen - Sgt. Brandy Harder
- Don Thompson - Specialist 3rd Class Anthony Figurski
- Lee Jeffery - Lt. Paolo 'Redwing' McKay
- Tiffany Lyndall-Knight - Hybrid
- Barry Nerling - Adama's Corporal
- Ryan Robbins - Charlie Connor
- Christina Schild - Playa Palacios
- Donna Soares - Geminon Delegate
- Vincent Gale - Chief Peter Laird
- Michael Leisen - Pvt. Stewart Jaffee
- Craig Veroni - LCPL Eduardo Maldonado
- Alain Chanoine - Marine Reb
- Mike Dopud - Crewman Specialist Gage
- Andrew McIlroy - Jacob Cantrell
- Marilyn Norry - Reza Chronides
- Judith Maxie - Picon Delegate
- Iris Paluly - Delegate Dahlia
- Veena Sood - Quorum Delegate
- Adrian Holmes - Specialist Parr
- G. Patrick Currie - Enzo
- Keegan Connor Tracy - Jeanne
- Rebecca Davis - Naia
- Merwin Mondesir - Marine
- Tammy Gillis - Marine
- Erika-Shaye Gair - Young Kara
- Patrick Gilmore - Rafferty
- Cherilynn Fulbright - Dionne
- Antony Holland - Julius Baltar
- Ivan Cermak - Corporal D. Wallace
- Torrance Coombs - Lance Corporal C. Sellers
- Elan Ross Gibson - Nurse Barbara
- Samantha Kaine - Crewmember
- France Perras - Sandra Roslin
- Sarah Deakins - Cheryl Roslin
- David Patrick Green - Xeno Fenner
- Susan Hogan - Captain Doyle Franks
- William Samples - Captain Jules Tarney
- Curtis Caravaggio - Marine Nathanson
- Stefanie Samuels - Police Officer
- Tobias Mehler - Zak Adama
- P.J. Prinsloo - Lt. Mei 'Freaker' Firelli
- Leah Cairns - Lt. Margaret 'Racetrack' Edmondson
- Rick Worthy - Simon
- Lara Gilchrist - Paulla Schaffer
- Leela Savasta - Tracey Anne
- Donnelly Rhodes - Dr. Sherman Cottle
- Mark Sheppard - Romo Lampkin
- Dean Stockwell - John Cavil
- Matthew Bennett - Aaron Doral
- Kerry Norton - Paramedic Layne Ishay
- Brad Dryborough - Lt. Louis Hoshi
- Bodie Olmos - Lt. Brendan 'Hot Dog' Constanza
- Colin Lawrence - Lt. Hamish 'Skulls' McCall
- Colin Corrigan - Marine Allan Nowart
- Darcy Laurie - Dealino
- Simone Bailly - Shona
- Kevin McNulty - Frank Porthos
- Dan Payne - Sean Ellison
- Ken Jones - Prisoner
- Michael Tayles - Flyboy
- Holly Eglington - Stripper
- Richard Jollymore - Marine
- Anthony St. John - Marine
- Ty Olsson - Captain Aaron Kelly
- Ryan Mottesheard
- Carla Robinson
- David Eick
- Ronald D. Moore
- Harvey Frand
- Toni Graphia
- Kent Sponagle
- Daniel Colman
- Bear McCreary
- Greg Hewett
Bill Duke hace el papel de Phelan.
Amanda Plummer interpreta a Oracle en la serie.
Dean Stockwell hace el papel de Brother Cavil.
James Remar interpreta a Meier en la serie.
Edward James Olmos interpreta a William Adama en la serie.
Mary McDonnell interpreta a Laura Roslin en la serie.
Jamie Bamber hace el papel de Lee 'Apollo' Adama.
Katee Sackhoff hace el papel de Kara 'Starbuck' Thrace.
James Callis interpreta a Gaius Baltar en la serie.
Tricia Helfer interpreta a Number Six en la serie.
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