| Part of the series on | |
| Actor | Character | Episode |
|---|---|---|
| James Ashcroft | Deputy Hallahan | "Haven" |
| Eric Breker | Agent #1 | "The Berrisford Agenda" |
| Terry Chen | S1W Member | "Brainiac" |
| Nicki Clyne | Fixit | "Bag 'Em" |
| Mike Dopud | Cop #3 | "Two" |
| Aaron Douglas | Hotel Clerk | "Exposure" |
| Michael Eklund | Officer Miller | "Flushed" |
| Lorena Gale | Teacher | "Hit a Sista Back" |
| Susan Hogan | Aunt Margo | "Art Attack" |
| Alessandro Juliani | Druid | "Pilot: Part 1", "C.R.E.A.M.", "411 on the DL", "She Ain't Heavy" |
| Colin Lawrence | Sgt. O'Neill | "...and Jesus Brought a Casserole", "Polo Locco", "The Kidz Are Aiight" |
| Tiffany Lyndall-Knight | TV Commercial Lady | "Brainiac" |
| John Mann | British Eddie | "Two", "Some Assembly Required" |
| Kandyse McClure | Annie Fisher | "Hello, Goodbye"; "Dawg Day Afternoon" |
| Ty Olsson | Mario, Driver | "The Berrisford Agenda", "Pilot: Part 1" |
| Grace Park | Female Breeding X-5 | "Designate This" |
| Eileen Pedde | Hannah Sukova | "Pilot: Part 1", "Pilot: Part 2" and "Heat" |
| Tahmoh Penikett | N.D. Cop #1 | "Freak Nation" |
| Callum Keith Rennie | Sheriff Lamar | "Exposure" |
| Ryan Robbins | Arnie Haas | "Art Attack", "Pilot: Part 1" |
| Rekha Sharma | Dr. Beverly Shankar | "Hello, Goodbye", "Love in Vein", "Radar Love", "Pollo Loco", "Art Attack" |
| Sebastian Spence | Charles Smith | "Hit a Sista Back" |
| Craig Veroni | Otto Gottlieb | "Gill Girl", "Medium Is the Message", "Harbor Lights", "Exposure", "Hello, Goodbye", "Dawg Day Afternoon", "She Ain't Heavy", "Love Among the Runes", and "Freak Nation" |
| Nana Visitor | Dr. Elizabeth Renfro/Madame X | "Designate This", "...and Jesus Brought a Casserole", "Meow", "Hit a Sista Back", "I and I Am a Camera", "Pollo Loco" |
| Connor Widdows | Bugler | "Bag 'Em" |
| Sam Witwer | Marrow | "Love in Vein" |
| Rick Worthy | Lieutenant Clemente | "Freak Nation" |
Galactica 1980 definition: Troy mispronounces this as the word "am," which is corrected by the desk clerk (1980: "The Night the Cylons Landed, Part I")
Re-imagined Series definition: used to signify a civilian transport vessel over a certain gross weight/mass, i.e. Colonial Heavy 798