| Kiefer Sutherland | Jack Bauer |
| Yvonne Strahovski | Kate Morgan |
| Tate Donovan | Mark Boudreau |
| Mary Lynn Rajskub | Chloe O'Brian |
| William Devane | President James Heller |
| Gbenga Akinnagbe | Erik Ritter |
| Kim Raver | Audrey Boudreau |
| Tzi Ma | Cheng Zhi |
| Stanley Townsend | Anatol Stolnavich |
| Ross McCall | Ron Clark |
| Branko Tomovic | Belcheck |
| Miranda Raison | Caroline Fowlds |
| Adam Sinclair | Gavin Leonard |
| Philip Winchester | Colonel Shaw |
| Corey Johnson | Admiral |
| Kevin McNally | Russian Agent |
| David Yip | President Wei |
| Stephen Fry | Prime Minister Alastair Davies |
| Jonathan Chan-Pensley | Cheng's Thug |
| Tom Christian | TAC Agent Nash |
| Tuyen Do | Jiao Sim |
| Sam Hare | Audrey's SS Agent #2 |
| Dan Li | Chinese Tech |
| Denis Lill | Captain of the Letitcia |
| Jadran Malkovich | Russian Mercenary |
| Leemore Marrett Jr. | Audrey's SS Agent #1 |
| Alison Pargeter | Lydia |
| Kevin Shen | Chinese Sniper |
| Russell Wilcox | Andrew |
| Jozef Aoki | Cheng's Thug |
| John Carr | British Dignitary |
| Eddy De Brito | US Airforce Major Z. Kazim |
| Anthony Farrelly | CO19 Police Sgt |
| Kevin Fyfe | Russian Bodyguard |
| Cynthia Garbutt | CIA Agent |
| Kya Garwood | Presidential Aide |
| David Howkins | CIA Agent |
| Jefferson King | Secret Service Agent |
| Jorge Leon Martinez | US Secret Service |
| Lukaz Leong | Audrey's Shooter |
| Sid Man | Chinese War Room Security |
| Gary Mancini | Armed response Police |
| Grayson James Matthews | Presidential Staff |
| Martyn Mayger | Protester |
| Keith Milner | Senior Police Officer |
| James M.L. Muller | CIA Agent |
| Yves O'Hara | Funeral Guest |
| Stephen Parker | CIA Agent |
| Adam Prickett | Foreman |
| Dale Roberts | Hacker |
| Dean Sills | Police Sergeant |
| Albert Tang | Commuter |
| Jon Wennington | Presidential staff |
| Daniel Westwood | Secret Service Agent |
| Chris Wilson | Police Officer |