- Becky Haynie
- Â Captain Renae Lucas 10 episodes
- Emily Fox
- Â Sasaki 10 episodes
- M. Connor Thompson
- Â Vogel / ... 9 episodes
- Hailey Nebeker
- Â Dr. Joanna Smith 8 episodes
- Melissa Brinkerhoff
- Â Jamie Kelso 8 episodes
- Janlyn Williams
- Â Admiral Rathbone / ... 8 episodes
- Matt Tramel
- Â Armand 7 episodes
- Daniel McLeod
- Â Jack Michaels 7 episodes
- Martin Casaus
- Â Guerrero 6 episodes
- Eric Ramaekers
- Â Allastair 'Mack' Goffe 6 episodes
- Jacob Smiley
- Â Okeke 6 episodes
- Meghan Mason
- Â Rivera / ... 6 episodes
- Lyssa Monson
- Â Natasha 6 episodes
- Yvonne D Bennett
- Â Ambassador Uwimana 5 episodes
- Anthony LeRoy Lovato
- Â Ambassador Abaroa 5 episodes
- Jihae Song
- Â Ambassador Kyo 5 episodes
- Joel Applegate
- Â Kozlov 5 episodes
- Noah Kershisnik
- Â Dr. Adrian Clarke 4 episodes
- Bryce Bishop
- Â Mikel 4 episodes
- Warren Helbach
- Â Admiral Benjamin Smith 4 episodes
- Emma Penrose
- Â Dr. Kelly Lucas 3 episodes
- Ellen Smith
- Â Fritz 3 episodes
- Walter Mecham
- Â Hanz 3 episodes
- Ron Hausman
- Â Tom Lucas 3 episodes
- Karlee Broschinsky
- Â Jackie Lucas 3 episodes
- Cal Nguyen
- Â Colbee / ... 3 episodes
- Quinci Staker
- Â Thorn 3 episodes
- Mycole Thon
- Â Yaramundi 3 episodes
- Mili Parks
- Â Angela Lucas 3 episodes
- Emily Broschinsky
- Â Sydney Lucas 3 episodes
- Tanya Beesley
- Â Daku 3 episodes
- Michael Christopher Gines
- Â Peter Lucas / ... 3 episodes
- Ema Doenges
- Â Danny Hill 3 episodes
- Sarah Kent
- Â Hahn 2 episodes
- Lenni Uitto
- Â Nils 2 episodes
- Robert Milo Andrus
- Â Jim 'Keldhor' Jones 2 episodes
- Rachelle Hardy
- Â Crewmember #2 / ... 2 episodes
- Nicole Munro
- Â Darana 2 episodes
- Jasmine Petrell
- Â Kasun 2 episodes
- Rein Deboer
- Â Boy 2 episodes
- Loren Lambert
- Â Victor 2 episodes
- Jessica DeBoer
- Â Dr. Karla Malone 2 episodes
- Emily Baker
- Â Katy 2 episodes
- Brittany Baldy
- Â Talia 2 episodes
- Eric Osmond
- Â James the Bartender 1 episode
- Jake Ulasich
- Â Lane Cannoli Adams 1 episode
- Dana Anquoe
- Â Captain Pearson 1 episode
- Robin Towle
- Â Creature 1 episode
- Tiffany Pipkin
- Â Dr. Madsen 1 episode
- Cheryl Holdaway
- Â Jeanie 1 episode
- Angelique Adamson
- Â Crewmember #1 1 episode
- Angelique Adamson
- Â Hostage / ... 1 episode
- Lexi DeBoer
- Â Jack's Daughter 1 episode
- Emily Baker
- Â Katy 1 episode
- Jamie Kyle Terry
- Â Hostage 1 episode
- Robbi Kindt
- Â Captain Lois Walker 1 episode
- Kyson Fox-Wilhelm
- Â Jack's Son 1 episode
- Calie Matthews
- Â Captain Butler 1 episode
- Shane Morrisun
- Â Crewmember 1 1 episode
