 | Michael Stütelberg | Clause Elberg 6 episodes, 2009-2018 |
| | Tanner Schaff | Charlie Christianson 4 episodes, 2011-2018 |
| | Elijah Morrissey | Zach Banner / ... 3 episodes, 2009-2013 |
| | Neal Hungerford | General Noric / ... 3 episodes, 2013-2018 |
| | Calen Mulenburg | Engine Bradly / ... 3 episodes, 2009-2013 |
| | Lane Blanchard | Lt. Harrison / ... 3 episodes, 2013-2018 |
| | Kathryn Mankenberg | Michele Tyler / ... 2 episodes, 2011-2013 |
| | Caleb Dalbec | Engines Gelsen / ... 2 episodes, 2009-2011 |
| | Steve Briggs | Lt. O'Reilly 2 episodes, 2011-2013 |
| | Connor Mankenberg | Lt. Brennan / ... 2 episodes, 2013-2018 |
| | Josiah Parker | Allen Clark / ... 2 episodes, 2013 |
| | Dan Vomhof | Communicator / ... 2 episodes, 2013 |
| | George Kayaian | Admiral Bill Dollard / ... 2 episodes, 2011-2018 |
| | Josh Ross | Lt. Tavek / ... 2 episodes, 2009-2013 |
| | Kenneth Thomson Jr. | Ray Martin 2 episodes, 2013-2018 |
| | Lloyd Penney | Alien Computer 2 episodes, 2011-2013 |
| | Megan Hofteig | Michelle Tyler 1 episode, 2009 |
| | Ben Kranz | The Bartender 1 episode, 2014 |
| | Marshall Kohls | Doctor Miller 1 episode, 2009 |
| | Stephan Mittelstrass | Comm. 1 episode, 2013 |
| | Landon Schaaf | Young Clause Elberg 1 episode, 2014 |
| | Tanner Hanke | Lt. Cryle 1 episode, 2009 |
 | Tristan Corrigan | Lt. Rich Smith 1 episode, 2011 |
| | Cody Harmening | Nick Sather 1 episode, 2013 |
| | Katherine Gentner | Aleea 1 episode, 2018 |
| | Colten Hughes | Commodore Shrelic 1 episode, 2011 |
| | Bill Torola | Private Lenan 1 episode, 2018 |
| | Adric Towsley | Srgt. Seefin 1 episode, 2018 |
| | Kevin Hard | Commander Valaris 1 episode, 2009 |
| | Kelsey Michel | Engineer 1 episode, 2013 |
| | Raron Marx | Private Ingel 1 episode, 2018 |
| | Jared Nordberg | Cell Guard / ... 1 episode, 2013 |
| | Zac Patton | Kernic 1 episode, 2018 |
| | Oakley Clark | Mirror Science Officer 1 episode, 2009 |
| | Skylar Peterson | Ms. Hayes 1 episode, 2013 |
| | Austin Beach | Lt. Nista 1 episode, 2018 |
| | Eli Parker | Minister Eklin 1 episode, 2018 |
 | Gina Hernandez | Ship's Computer 1 episode, 2011 |
| | Cole Cameron | Gestapo Agent 1 episode, 2018 |
| | James Michael Avalos | Mr. Singh 1 episode, 2013 |
| | Travis Jacobsen | Ekosion Officer 1 episode, 2018 |
| | Mildred Thomson | Diana Palmer 1 episode, 2013 |
| | Matt Crowe | Mr. Hanson 1 episode, 2013 |
| | Stuart Foley | Zaon Captain 1 episode, 2018 |
| | Paul Zartman | Gestapo HQ Chief 1 episode, 2018 |
| | Ryan Kingsbury | Zaon Shuttle Pilot 1 episode, 2018 |
| | Mark Hildebrand | Kruge 1 episode, 2013 |
| | Dominic Kinzler | Zaon Tanker #1 1 episode, 2018 |
| | Ryan J. Gilmer | Zaon Tanker #2 1 episode, 2018 |
| | Scott Stutelberg | Gorn / ... 1 episode, 2013 |
| | David Niemela | Zaon Soldier #1 1 episode, 2018 |
| | Max Wodarczyk | Pirate #3 1 episode, 2013 |
| | Tom Dorn | Zaon Soldier #2 1 episode, 2018 |
| | Shawn Stemsrud | Venok 1 episode, 2013 |
| | Weston Blanchard | Zaon Soldier #4 1 episode, 2018 |
| | Carl Blanchard | Zaon Soldier #5 1 episode, 2018 |
| | Ralph M. Miller | Gorn 1 episode, 2013 |
| | Austin Ivan Marx | Ekosion Pilot 1 episode, 2018 |
| | Chris Thomson | Mirror Jones 1 episode, 2018 |
 | Randy Wrenn | John Gill 1 episode, 2018 |
| | Jeffrey Bryars | Major Robert 1 episode, 2018 |
| | Kiersten Akins | Lt. Mitchell 1 episode, 2018 |
