Horizon Season 3

Main Characters

 * Kiefer Sutherland as Colonel John Grant (24/24 Episodes)
 * Ashley Scott as Commander Sivea Ve'nal (24/24 Episodes)
 * Ben Browder as Major Chase Reynolds (24/24 Episodes)
 * Carlos Bernard as Major David Connor (23/24 Episodes)
 * Rachael Leigh Cook as Christine Summers (24/24 Episodes)
 * Dion Johnstone as Doctor Tom Galloway (22/24 Episodes)
 * With Dennis Haysbert as Commander De'van Callen (24/24 Episodes)
 * And Andrew J. Robinson as Doctor Lenori (22/24 Episodes)

Recurring Characters

 * Daniel Dae Kim as Lieutenant Colonel Hikaru Sato (6/24 episodes)
 * Keith Hamilton Cobb as Lieutenant/Lieutenant Commander Hiron Bay'lar
 * President Adari
 * Emma Caulfield as Juila Connor
 * Caitlin Connor
 * Scott MacDonald as Sivok
 * Casey Biggs as Lonik
 * Molly Brink as Mediator/Regent Loral/Kardos
 * Aaron Douglas as Vorian Technician
 * Armin Shimerman as Zach Hoffmann
 * Jack Gwaltney as Dureg
 * Leah Remini as Arina Tey'vell (2/24 Episodes)
 * Phillip Rhys as Doctor Yusuf Naiyeer
 * Steven Culp as Day'ek Sonak
 * Gary Jones as Chief Master Sergeant Walter Harriman
 * Julian Sands as Council Vahret