- Charles Root
- Â Scott / ... 14 episodes, 2004-2023
- John M. Kelley
- Â Dr. McCoy / ... 13 episodes, 2004-2021
- James Cawley
- Â Kirk / ... 12 episodes, 2004-2021
- Jeff Mailhotte
- Â Sentell / ... 11 episodes, 2004-2014
- Patrick Bell
- Â Xon / ... 10 episodes, 2004-2023
- Ron Boyd
- Â DeSalle / ... 10 episodes, 2004-2013
- Brandon Stacy
- Â Mr. Spock / ... 8 episodes, 2011-2023
- Jay Storey
- Â Kyle / ... 8 episodes, 2004-2012
- Ron M. Gates
- Â Extra / ... 8 episodes, 2006-2016
- Paul Sieber
- Â Ahrens / ... 8 episodes, 2006-2013
- Ed Abbate
- Â Extra / ... 8 episodes, 2004-2011
- Brian Holloway
- Â Extra / ... 8 episodes, 2007-2014
- Riva Gijanto
- Â Extra / ... 7 episodes, 2006-2013
- Ralph M. Miller
- Â Extra / ... 7 episodes, 2006-2013
- Bobby Rice
- Â Peter Kirk 6 episodes, 2008-2013
- Meghan King Johnson
- Â Rand 6 episodes, 2004-2012
- John Carrigan
- Â Kargh / ... 6 episodes, 2004-2013
- Kim Stinger
- Â Uhura 5 episodes, 2008-2021
- Gwendolyn Wilkins
- Â Extra / ... 5 episodes, 2008-2014
- Jeffery Quinn
- Â Spock / ... 5 episodes, 2004-2011
- Julienne Irons
- Â Uhura 5 episodes, 2004-2011
- Andy Bray
- Â Chekov 5 episodes, 2006-2011
- Brian Gross
- Â Kirk / ... 4 episodes, 2012-2023
- Rick Bruns
- Â Extra 5 episodes, 2008-2014
- Jonathan Zungre
- Â Chekov 4 episodes, 2011-2013
- Robert Withrow
- Â Admiral Withrow / ... 4 episodes, 2012-2023
- Clay Sayre
- Â Alien Commander / ... 4 episodes, 2012-2023
- John Lim
- Â Sulu / ... 4 episodes, 2004-2007
- Anne Carrigan
- Â Le'ak / ... 4 episodes, 2006-2013
- Giovanna Contini
- Â Extra / ... 4 episodes, 2006-2009
- Jessica Mailhotte
- Â Extra / ... 4 episodes, 2004-2009
- Amanda Root
- Â Extra / ... 4 episodes, 2006-2011
- Kent Schmidt
- Â Extra / ... 4 episodes, 2006-2014
- Ryan Storey
- Â Extra 4 episodes, 2008-2012
- Jasmine Pierce
- Â Lieutenant Uhura / ... 3 episodes, 2012-2016
- Wayne W. Johnson
- Â Ensign Walking Bear / ... 3 episodes, 2012-2016
- Brian Tubbs
- Â Centurian / ... 4 episodes, 2013-2023
- John Mulhern
- Â Extra / ... 3 episodes, 2011-2016
- Shyaporn Theerakulstit
- Â Lieutenant Sulu 3 episodes, 2014-2023
- Rivkah Raven Wood
- Â Computer / ... 3 episodes, 2014-2023
- Shannon Quinlan
- Â Chapel / ... 3 episodes, 2004-2006
- Larry Nemecek
- Â Cal Strickland / ... 3 episodes, 2004-2011
- Deniz Cordell
- Â Bernstein 3 episodes, 2011-2013
- Michael Stern
- Â Extra / ... 3 episodes, 2011-2016
- James Avalos
- Â K'laar / ... 3 episodes, 2009-2013
- Chris Lunderman
- Â Crewman / ... 3 episodes, 2004-2011
- David Dufrane
- Â Extra / ... 3 episodes, 2006-2011
- Jeffrey Collinsworth
- Â Extra 3 episodes, 2008-2013
- Paula Bailey
- Â Extra 3 episodes, 2008-2011
- John Herrmann
- Â Extra 3 episodes, 2008-2011
- Mark Strock
- Â Extra / ... 3 episodes, 2004-2013
- Howard Miller
- Â Extra / ... 3 episodes, 2008-2011
- Robert Mauro
- Â Extra 3 episodes, 2008-2013
- Glenn E. Smith
- Â Extra 3 episodes, 2008-2011
- Pat Heward
- Â Extra 3 episodes, 2008-2013
- Kurt Carley
- Â Agent Jones / ... 3 episodes, 2004-2011
- Vic Mignogna
- Â Extra / ... 3 episodes, 2011-2021
- Jaime Sanchez
- Â Extra / ... 3 episodes, 2013-2023
- Jerry Storey
- Â Extra / ... 3 episodes, 2006-2009
- Michael K. Tavarez
- Â Extra / ... 3 episodes, 2006-2013
- Ben Tolpin
- Â Mr. Spock 2 episodes, 2008-2009
- Jeff Bond
- Â Dr. McCoy 2 episodes, 2014-2023
- Evan Fowler
- Â Alex Freeman 2 episodes, 2008-2009
- J.T. Tepnapa
- Â Sulu 2 episodes, 2011-2012
- BarBara Luna
- Â Alersa / ... 2 episodes, 2004-2011
- Mari Okumura
- Â Comm. Officer 2 / ... 2 episodes, 2006
- Nick Cook
- Â Hodel 2 episodes, 2008-2009
- Debby Huth
- Â Fontana 2 episodes, 2008-2009
- Joel Bellucci
- Â Bren 2 episodes, 2008-2009
- Mark Edward Lewis
- Â Field Doctor / ... 2 episodes, 2014-2016
- Pearl Marshall
- Â Security Officer 2 episodes, 2004
- Tanveer Naseer
- Â Extra / ... 2 episodes, 2007-2011
- Matt Bucy
- Â Crewman / ... 2 episodes, 2011-2012
- Scott Danni
- Â Extra 2 episodes, 2008-2009
- Rebecca Larken
- Â Extra / ... 2 episodes, 2014-2023
- Timothy Sherffeild
- Â Crewman 2 episodes, 2004
- Amber Kent
- Â Extra / ... 2 episodes, 2014-2016
- Jerry Yuen
- Â Crewman 2 episodes, 2004
- Rich Lundy
- Â Extra 2 episodes, 2008-2009
- Andrew Grieb
- Â Dead Klingon / ... 2 episodes, 2012-2013
- Marybeth Ritkouski
- Â Extra / ... 2 episodes, 2014-2023
- Douglas S. Caprette
- Â Extra 2 episodes, 2012-2013
- Douglas Calvin
- Â Extra 2 episodes, 2013-2014
- Tony DeGregorio
- Â Extra 2 episodes, 2012-2013
- Nick Santamarina
- Â Extra 2 episodes, 2011-2012
- Mabel V. Romero
- Â Extra 2 episodes, 2008-2009
- Joe Nazzarro
- Â Extra 2 episodes, 2008-2009
- George Wilhelm
- Â Extra 2 episodes, 2008-2009
- Gregory L. Schnitzer
- Â Extra 2 episodes, 2008-2009
- Glen L. Wolfe
- Â Extra 2 episodes, 2014-2016
- Danielle Porter
- Â Extra / ... 2 episodes, 2006-2007
- Erik Goodrich
- Â Extra 2 episodes, 2008-2009
- Howard Huth
- Â Extra 2 episodes, 2008-2009
- Danielle Porter
- Â Extra 2 episodes, 2009-2011
- Marc P. Hagerthy
- Â Extra 2 episodes, 2011-2013
- Carl Mazur
- Â Extra 2 episodes, 2008-2009
- Christopher LaRoche
- Â Extra 2 episodes, 2013-2014
- Emlee Vassilos
- Â Chapel / ... 1 episode, 2012-2016
- Pony R. Horton
- Â Agent Smith / ... 2 episodes, 2011-2013
- Ronn Smith
- Â Andock / ... 2 episodes, 2011-2021
- Willie K. Yee
- Â Extra 2 episodes, 2013-2014
- Alec Peters
- Â Garth / ... 1 episode, 2012-2021
- Kelly Heffernan
- Â Rand 1 episode, 2012
- Jack Marshall
- Â Scott 1 episode, 2004
- Walter Koenig
- Â Lt. Pavel Chekov 1 episode, 2006
- George Takei
- Â Sulu 1 episode, 2007
- Jacy King
- Â Dr. Carol Marcus 1 episode, 2016
- Richard Hatch
- Â Orthros 1 episode, 2023
- Mary Linda Rapelye
- Â Ambassador Rayna Morgan 1 episode, 2006
- Grace Lee Whitney
- Â Yeoman Janice Rand 1 episode, 2007
- Carl Sheldon
- Â Captain Scott 1 episode, 2016
- Majel Barrett
- Â The Computer 1 episode, 2007
- Nathan Gastineau
- Â Sciences 1 episode, 2006
- Christina Moses
- Â Alana 1 episode, 2007
- Jasen Tucker
- Â Chekov 1 episode, 2004
- William Windom
- Â Commodore Matt Decker 1 episode, 2004
- Malachi Throne
- Â Korogh 1 episode, 2004
- John Winston
- Â Captain Jefferies 1 episode, 2004
- Eddie Paskey
- Â Admiral Leslie 1 episode, 2004
- Becky Bonar
- Â Macgregor 1 episode, 2004
- Lia Johnson
- Â Dr. Chandris 1 episode, 2007
- Anna Schnaitter
- Â Isel 1 episode, 2012
- Pat Evans
- Â Doctor Wright 1 episode, 2014
- Andrea Ajemian
- Â Onabi 1 episode, 2004
- Mimi Chong
- Â Demora Sulu 1 episode, 2007
- Ayla Cordell
- Â Irska 1 episode, 2012
- Troy Bernier
- Â Orderly Fred 1 episode, 2014
- Sam Witwer
- Â Guardian's Voice 1 episode, 2004
- Natasha Soudek
- Â Lt. Soudek 1 episode, 2007
- Gil Gerard
- Â Admiral Sheehan 1 episode, 2013
- Shawn David
- Â Security Officer 1 episode, 2004
- Mallory Reaves
- Â Ensign Mallory 1 episode, 2007
- Charles Miller II
- Â Dickerson 1 episode, 2011
- Andrew Probert
- Â Commodore Probert 1 episode, 2013
- Dennis Hotston
- Â Reporter 1 episode, 2014
- Jim Van Over
- Â Jose Tyler 1 episode, 2004
- Kaley Pusateri
- Â Sulu's Granddaughter 1 episode, 2007
- Kenneth Thomson Jr.
- Â Captain Martin / ... 1 episode, 2013
- Charles Holloway
- Â Dr. Boyce 1 episode, 2004
- Tim Brazeal
- Â Klingon 1 1 episode, 2006
- Phil Keoghan
- Â Admiral Koeghen 1 episode, 2008
- Denise Crosby
- Â Dr. Jenna Yar 1 episode, 2009
- Sarah Deatherage
- Â Extra / ... 1 episode, 2014
- Susan Herzberg
- Â Technician 1 episode, 2016
- Rose Montesano
- Â Com. Officer 1 episode, 2004
- Ed Kaczmarek
- Â Mr. Leslie 1 episode, 2004
- Bill Blair
- Â Blodgette 1 episode, 2009
- Jodi Ballinger Bray
- Â Extra 1 episode, 2016
- Tim Giles
- Â Engineer 1 episode, 2004
- Cali T. Rossen
- Â Ensign Juvenia 1 episode, 2007
- Daniel Porter
- Â Extra 1 episode, 2008
- Cynthia Lin
- Â Communications Officer 1 episode, 2011
- Natalia Tudela
- Â Nurse 1 episode, 2012
- Kario Marcel
- Â Kitumba 1 episode, 2013
- Leslie Hoffman
- Â Crewperson 1 episode, 2004
- James R. Lowe
- Â Federation Ambassador 1 episode, 2006
- Cynthia Wilber
- Â Lieutenant Wyndham 1 episode, 2007
- Michele Specht
- Â Kali 1 episode, 2013
- Mark Blackwell
- Â Klingon Guard 1 episode, 2014
- Michael Anderson
- Â Crewman 1 episode, 2004
- Debbie Mailhotte
- Â Federation Ambassador 1 episode, 2006
- Kitty Kavey
- Â Lieutenant Turkel 1 episode, 2007
- Zoe Staubitz
- Â Baby Irska 1 episode, 2012
- Stephen Dillard
- Â Extra / ... 1 episode, 2014
- Anthony Laviano
- Â Crewman 1 episode, 2004
- John Whiting
- Â Tellarite Ambassador 1 episode, 2006
- Katrina Kernodle
- Â Yeoman 1 episode, 2007
- Teresa Noreen
- Â Computer Voice 1 episode, 2014
- Robert Mills
- Â Crewman 1 episode, 2004
- Patrick Cleveland
- Â Federation Ambassador 1 episode, 2006
- Katia Mangani
- Â Dead Romulan #1 1 episode, 2007
- Elizabeth Peterson
- Â Extra 1 episode, 2008
- Tal Baron
- Â Voral 1 episode, 2011
- Victor Izay
- Â William Mulholland 1 episode, 2014
- Randy Davis
- Â Crewman 1 episode, 2004
- Linda Cleveland
- Â Federation Ambassador 1 episode, 2006
- R.W. Martin
- Â Dead Romulan #2 1 episode, 2007
- J.C. Carey
- Â Extra 1 episode, 2012
- Romel Punsal
- Â Extra / ... 1 episode, 2013
- Christopher Blade
- Â Extra 1 episode, 2014
- Mike Magin
- Â Crewman 1 episode, 2004
- Don Baldaramos
- Â Dead Romulan #3 1 episode, 2007
- Thomas Brown
- Â Extra 1 episode, 2009
- James A. Bray
- Â Extra 1 episode, 2014
- Steve Leclerc
- Â Federation Ambassador / ... 1 episode, 2006
- Steve Perry
- Â Pilot 1 episode, 2007
- Mike Fillman
- Â Extra 1 episode, 2012
- Tasha Hardy
- Â Extra 1 episode, 2007
- John Olsen
- Â Peshan #2 1 episode, 2011
- Brian Hudon
- Â Crewman 1 episode, 2004
- Lucie Faria-Cook
- Â Extra 1 episode, 2009
- Rick Hamilton
- Â Extra 1 episode, 2012
- Glenn Jenner
- Â Extra / ... 1 episode, 2013
- Rick Chambers
- Â Extra 1 episode, 2014
- Doug Hutchings
- Â Crewman 1 episode, 2004
- Seven BryJoseph
- Â Extra 1 episode, 2007
- Roberta de Rosa
- Â Extra 1 episode, 2012
- Edwin C. Thrower
- Â Extra / ... 1 episode, 2013
- Keegan Choffat
- Â Extra 1 episode, 2014
- Mark Withall
- Â Extra 1 episode, 2007
- Elzabeth Durkee
- Â Extra 1 episode, 2009
- Sarah McLintic
- Â Extra / ... 1 episode, 2013
- Steven Colucci
- Â Extra 1 episode, 2014
- Betsy Durkee
- Â Extra 1 episode, 2008
- Brad 'Burad' Graper
- Â Extra / ... 1 episode, 2013
- Michael Struck
- Â Starfleet Personnel 1 episode, 2006
- Joan Teegarden
- Â Extra 1 episode, 2012
- Bryan Patrick Stoyle
- Â Tavern Klingon 1 episode, 2013
- Ian Peters
- Â Starfleet Personnel 1 episode, 2006
- John Paladin
- Â Kluge 1 episode, 2013
- Clarence Donath
- Â Extra 1 episode, 2014
- Nathan Gasineau
- Â Starfleet Personnel 1 episode, 2006
- Tim Johnson
- Â Extra 1 episode, 2007
- Christa Haley
- Â Extra / ... 1 episode, 2013
- Steven Fritz
- Â Extra 1 episode, 2014
- Annalisa Bardi
- Â Extra 1 episode, 2013
- Jessica Headlee
- Â Extra 1 episode, 2014
- Rick Burns
- Â Extra 1 episode, 2013
- Scott C. Johnson
- Â Extra 1 episode, 2014
- Winston Engle
- Â Extra 1 episode, 2007
- Michael Ninivaggi
- Â Extra 1 episode, 2011
- Edward Kear III
- Â Extra 1 episode, 2014
- Sarah Gibbs
- Â Extra 1 episode, 2007
- Paula Ninivaggi
- Â Extra 1 episode, 2011
- Natalie Calvin
- Â Extra 1 episode, 2013
- Steve Kelley
- Â Extra 1 episode, 2014
- Max Kiserman
- Â Starfleet Personnel 1 episode, 2006
- Sarah Hurlburt
- Â Extra 1 episode, 2007
- Diana Kingsbury
- Â Extra 1 episode, 2014
- Carol Crouse
- Â Extra 1 episode, 2013
- Tom Brown
- Â Extra 1 episode, 2008
- Earl Peltier
- Â Extra 1 episode, 2007
- Linda Falvo
- Â Extra 1 episode, 2013
- Alex 'A.J.' McDonald
- Â Extra 1 episode, 2014
- Kathy Pillsbury
- Â Extra 1 episode, 2007
- Ruth Falvo
- Â Extra 1 episode, 2013
- Ken Horkavy
- Â Extra 1 episode, 2007
- Elizabeth Peterson
- Â Extra 1 episode, 2009
- Cesar Martin
- Â Extra 1 episode, 2011
- Sam Falvo
- Â Extra 1 episode, 2013
- Dom Parry
- Â Extra 1 episode, 2014
- Christopher Cardoza
- Â Extra 1 episode, 2007
- Samuel A. Falvo II
- Â Extra 1 episode, 2013
- Joshua W. Price
- Â Extra 1 episode, 2014
- Tony Falvo
- Â Extra 1 episode, 2013
- Dan R. Reynolds
- Â Extra 1 episode, 2014
- Ben Farda
- Â Extra 1 episode, 2013
- Jani Fleet
- Â Extra 1 episode, 2013
- Jeffrey Forsyth
- Â Extra 1 episode, 2013
- Felicia Schaller
- Â Extra 1 episode, 2014
- Rob Fredricksen
- Â Extra 1 episode, 2013
- Grace Sun
- Â Extra 1 episode, 2014
- Shawn Tabor
- Â Extra 1 episode, 2014
- Marci Hall
- Â Extra 1 episode, 2013
- Alex Viaggio
- Â Extra 1 episode, 2014
- Al Hartman
- Â Extra 1 episode, 2013
- Henning Wendt
- Â Extra 1 episode, 2014
- VeEtta Withrow
- Â Extra 1 episode, 2014
- Colin 'Whiskers' Hinckley
- Â Extra 1 episode, 2013
- Clint Young
- Â Extra 1 episode, 2014
- Matthew LaRoche
- Â Extra 1 episode, 2013
- Iyla Macarthur
- Â Extra 1 episode, 2013
- Moriah Martel
- Â Extra 1 episode, 2013
- John 'Heswi' Miller
- Â Extra 1 episode, 2013
- Scott Mitchell
- Â Extra 1 episode, 2013
- Emory Moody
- Â Extra 1 episode, 2013
- Gennarose Nethercott
- Â Extra 1 episode, 2013
- Katie Orfinger
- Â Extra 1 episode, 2013
- Michael Orfinger
- Â Extra 1 episode, 2013
- Michael Perry
- Â Extra 1 episode, 2013
- Terry 'TaRa' Pilgrom
- Â Extra 1 episode, 2013
- Carol Provoncha
- Â Extra 1 episode, 2013
- Rick Salazar
- Â Extra 1 episode, 2013
- Raphi Shamas
- Â Extra 1 episode, 2013
- Steph Syslo
- Â Extra 1 episode, 2013
- Frank Tropepi
- Â Extra 1 episode, 2013
- Shannon Delaney Ward
- Â Extra 1 episode, 2013
- Philip Kim
- Â Starfleet Com Officer 1 episode, 2006
- Tim Russ
- Â Erlichmann Plumbers 1 episode, 2011
- Colin Cunningham
- Â Captain Pike 1 episode, 2021
- Matthew Ewald
- Â Cadet Kirk 1 episode, 2021
- Jeff Johnson
- Â Finnegan 1 episode, 2021
- Gina Hernandez
- Â Number One 1 episode, 2021
- William Walker
- Â Navigator 1 episode, 2021
- Frank Hernandez
- Â Pitcairn 1 episode, 2021
- Sarah Priest
- Â Admiral Withrow 1 episode, 2021
- Cat Roberts
- Â Yeoman Janice Rand 1 episode, 2023
- Emma Patricia Roberts
- Â Dr. Ann Mulhall 1 episode, 2023
- Joseph John Roberts
- Â Crewman 1 episode, 2023
- Austin Justice Roberts
- Â Crewman 1 episode, 2023
- Christopher Russo
- Â Fabrini console operator 1 episode, 2023
- Daren Dochterman
- Â Claudius Marcus 1 episode
- Jonathon Carter Schall
- Â Flavius 1 episode
- William Cheney
- Â Science Officer (uncredited) 1 episode, 2004
- Christopher Doohan
- Â Arex (uncredited) 1 episode, 2012
- Denise DeGregorio
- Â DeGregorio (uncredited) 1 episode, 2012