Pablo Schreiber
Master Chief, Spartan-117 / John-117 (17 eps)
Natascha McElhone
Dr. Catherine Halsey (17 eps)
Shabana Azmi
Margaret Parangosky (17 eps)
Natasha Culzac
Riz-028 (17 eps)
Olive Gray
Dr. Miranda Keyes (17 eps)
Yerin Ha
Kwan Ha (17 eps)
Bentley Kalu
Vannak-134 (17 eps)
Charlie Murphy
Makee (17 eps)
Danny Sapani
Jacob Keyes (17 eps)
Jen Taylor
Cortana (voice) (17 eps)
Bokeem Woodbine
Soren-066 (17 eps)
Fiona O'Shaughnessy
Laera (11 eps)
Tylan Bailey
Kessler (11 eps)
Joseph Morgan
James Ackerson (8 eps)
Christina Bennington
Cortana (8 eps)
Cristina Rodlo
Corporal Talia Perez (8 eps)
Viktor Åkerblom
Arbiter Var 'Gatanai (8 eps)
Ryan McParland
Dr. Adun Saly (8 eps)
Burn Gorman
Vinsher Grath (5 eps)
Casper Knopf
Young John (4 eps)
Julian Bleach
Hierarch Mercy (voice) (4 eps)
Olwen Fouéré
The Mother (4 eps)
Jamie Beamish
Kaidon (3 eps)
Sarah Ridgeway
John's Mother (3 eps)
Hans Peterson
Ops Tech / Ops Tech Pereira (3 eps)
Duncan Pow
John's Father (3 eps)
Hilton McRae
Hierarch Regret (voice) (3 eps)
Claudius Peters
MP Malya (3 eps)
Karl Johnson
Hierarch Truth (voice) (3 eps)
Juliette Motamed
Carina (3 eps)
David Crowley
Castor (3 eps)
Iliasz Shweirif
Virgil (3 eps)
Ivanno Jeremiah
Antares (3 eps)
Maria Luisa Costa
Manuela Perez (3 eps)
Marvin 'Krondon' Jones III
Louis-036 (3 eps)
Christian Ochoa
Danilo (3 eps)
Anna Koval
Captain Briggs (3 eps)
Dani Klupsch
Lt Mullins (3 eps)
Ailsa Davidson
Tech Smith (3 eps)
Tom Gaskin
Tech Jones (3 eps)
Johnny K. Palmer
Control Tech Ladi (2 eps)
Sky Yang
Ruben (2 eps)
Ian Pirie
Professor (2 eps)
Jeong-hwan Kong
Jin Ha (2 eps)
Samuel Tamunotoku Gbobo
Marine Doyle (2 eps)
Karen Gagnon
Flight Tech Juric (2 eps)
Danielle Fiamanya
UNSC Nurse (2 eps)
Felipe Gabriel Mariano
Malchin (2 eps)
Nila Aalia
Agatha Terne (2 eps)
Yuna Shin
Soojin Ha (2 eps)
Sebastian Orozco
Cousin Ant (2 eps)
Eliseo Barrionuevo
Cousin Mateo (2 eps)
María José Bavio
Aunt Lucia (2 eps)
Karen Connell
Yaz-112 (2 eps)
Bronte Carmichael
Julia (2 eps)
Thomas Dominique
Val-015 (2 eps)
Eniko Fulop
Marine Pvt (2 eps)
Nneka Okoye
Djanka (1 eps)
Shaun Aylward
Esso (1 eps)
Hayley Canham
Cara (1 eps)
Zachary Hing
Neru (1 eps)
Olivia Liu
Faaz (1 eps)
Miklós Béres
Sentry (1 eps)
Chan Woo Lim
Flight Tech Doan (1 eps)
Mirjam Novak
Flight Tech Tesic (1 eps)
Dávid Csányi
Colonel Stacker (1 eps)
Sebastián Viveros
Sergeant Mendez (1 eps)
Khash-Erdene Ganbold
Jong Sook (1 eps)
Ali Khan
Attu (1 eps)
Isaura Barbé-Brown
Katie Rios (1 eps)
Miranda Wilson
Penma (1 eps)
Francisco Labbe
David Agnoli (1 eps)
Iván Fenyő
Bota (1 eps)
Roderick Hill
Major Ira Halal (1 eps)
Josette Simon
Desiderata (1 eps)
Angie Cepeda
Violetta Franco (1 eps)
Johann Myers
Reth (1 eps)
Nóra Trokán
Daranka (1 eps)
Karl Akortia
Marine Gunnery Sergeant (1 eps)
Amirreza Farajvand
Marine Private (1 eps)
Jessica Fostekew
Marine Sergeant Borovoi (1 eps)
Dávid Miller
Murdo (1 eps)
Zsuzsanna Bíró
Young Girl (1 eps)
Gustavo Chiang
MP Takacs (1 eps)
Oladapo Oluwatosin Okunola
MP Choksey (1 eps)
Jaram Lee
Madrigal Elder (1 eps)
Caroline Boulton
Flight Technician Javal (1 eps)
Csémy Balázs
Evans (1 eps)
Scott Karim
Fazekas (1 eps)
Quynh Ngoc Do
Marine Lieutenant Goy (1 eps)
Balázs Bölkény
Wounded Marine (1 eps)
Martin Fisher
Raphael Bivas (1 eps)
J. Sebastian Lee
Young Father (1 eps)
Péter Jankovics
Filip (1 eps)
Gábor Nagypál
Squirrel (1 eps)
Anna Trokán
Trokan (1 eps)
Máté Bede-Fazekas
Pete (1 eps)
Joshua Jo
Man at the Well (1 eps)
Keir Dullea
Fleet Admiral Hood (1 eps)
Jude Cudjoe
Teenage Soren (1 eps)
Luke Polie
Captain Nix (1 eps)
Benjamin Wainwright
Gunnery Sgt Boone (1 eps)
Sam Gittins
Corporal Sims (1 eps)
Micah Karns
Corporal Fisk (1 eps)
Genesis Lynea
Lance Corporal Bowman (1 eps)
Luke Davis
Private Rand (1 eps)
Blake Patrick Anderson
Felix (1 eps)
Josie Lawrence
Minnie (1 eps)
Ashwin Varma
Refugee Husband (1 eps)
Vivien Nagy
Refugee Wife (1 eps)
Tomi May
Baz (1 eps)
Kamilla Szász
Vera (1 eps)
Franc Ashman
Ruby Ann (1 eps)
Nathan Wiley
Karim-002 (1 eps)
Jessica Chisnall
Virtual Companion (1 eps)
Sonny Poon Tip
Ensign Bishara (1 eps)
Mich Todorovic
Clive (1 eps)
Inotay Ákos
Oswyn (1 eps)
Zar Succarotte
Spiff Henchman #1 (1 eps)
Narantsogt Tsogtsaikhan
Spiff Henchman #2 (1 eps)
Jack Nevils
Marine Lt (1 eps)
Bill Paterson
Ackerson's Dad (1 eps)
Ádám Szabó
Guard #1 (1 eps)
Marcell Mászári
Guard #2 (1 eps)
Olwen May
Jade (1 eps)
Lotti Kővári
Specialist Pavlenko (1 eps)
Elijah Isaiah Cook
Captain Tyrell (1 eps)
Romany Gilmour
Marine Medic (1 eps)
Tamas Szaraz
Gunnery Sergeant (1 eps)
Stuart Laing
Doctor (1 eps)
Johnny O'Down
McCoy (1 eps)
Tímea Udvari-Kardos
Homesteader Woman (1 eps)
István Szacsvai
Homesteader Man (1 eps)
Rebecka Johnston
Holystander #1 (1 eps)
Cat Simmons
Garwyn (1 eps)
Lara Peake
Fern (1 eps)
Eddie Karanja
Boy (1 eps)
Aruzhan Ilaikova
Young Acolyte (1 eps)
Attila Heltai
Gilroy (1 eps)
Narcisse Mame
Okada (1 eps)
Payal Vashist
Scientist (1 eps)
Levente Pupics
ONI Guard (1 eps)
Bálint Antal
Black Ops Lieutenant (1 eps)
Andrew Senesie
Commander Bookman (1 eps)
Harry Lloyd
343 Guilty Spark (voice) (1 eps)
Audrey Brisson-Jutras
Janine (1 eps)
Amro Mahmoud
Lead Scientist (1 eps)
Zsófia Bach
Scientist (1 eps)