Series info
| Jennifer Garner | ... | Sydney Bristow (5 episodes) |
| Ron Rifkin | ... | Arvin Sloane (5 episodes) |
| Michael Vartan | ... | Michael Vaughn (5 episodes) |
| Bradley Cooper | ... | Will Tippin (5 episodes) |
| Merrin Dungey | ... | Francie Calfo (5 episodes) |
| Carl Lumbly | ... | Marcus Dixon (5 episodes) |
| Kevin Weisman | ... | Marshall Flinkman (5 episodes) |
| Victor Garber | ... | Jack Bristow (5 episodes) |
| Greg Grunberg | ... | Eric Weiss (4 episodes) |
| Evan Parke | ... | Charlie Bernard (3 episodes) |
| Angus Scrimm | ... | Calvin McCullough (2 episodes) |
| Aharon Ipalé | ... | Ineni Hassan (2 episodes) |
| Sarah Shahi | ... | Jenny (2 episodes) |
| Gina Torres | ... | Anna Espinosa (2 episodes) |
| Tony Sears | ... | German SD-6 Agent (2 episodes) |
| Maurice Chasse | ... | Luc Jacqnoud (2 episodes) |
| Jeff Chase | ... | Bodyguard (2 episodes) |
| Subash Kundanmal | ... | Dhiren Patel (2 episodes) |
| Edward Atterton | ... | Dr. Danny Hecht (1 episode) |
| Jay Gerber | ... | Professor Mizzy (1 episode) |
| William Wellman Jr. | ... | Priest (1 episode) |
| Ric Young | ... | Dr. Zhang Lee (1 episode) |
| Lorenzo Callender | ... | Messenger (1 episode) |
| Greg Collins | ... | Kenny (1 episode) |
| Vicki Davis | ... | Intern (1 episode) |
| Ming Lo | ... | Agent (1 episode) |
| Raymond Ma | ... | Taiwanese Businessman (1 episode) |
| Miguel Nájera | ... | Agent Gonzalez (1 episode) |
| Greta Sesheta | ... | C.I.A. Receptionist (1 episode) |
| Philip Tan | ... | Taiwanese Security Officer (1 episode) |
| Emily Wachtel | ... | Beth at Airline Counter (1 episode) |
| Nancy Wetzel | ... | Amy Tippin (1 episode) |
| Erik Betts | ... | Assassain (1 episode) |
| Gary Kuo | ... | Violinist (1 episode) |
| Ron Letterman | ... | Airplane Passenger (1 episode) |
| Mark Newsom | ... | Surveillance Tech (1 episode) |
| Aleksandr Kuznetsov | ... | Kazimir Shcherbakov (1 episode) |
| Ravil Isyanov | ... | Luri Karpachev (1 episode) |
| Ammar Daraiseh | ... | Supplier (1 episode) |
| Azdine Melliti | ... | Bodyguard (1 episode) |
| John Storey | ... | C.I.A. Officer (1 episode) |
| Xavier J. Nathan | ... | French Officer (1 episode) |
| Gregory Phelan | ... | Student (1 episode) |
| Seema Rahmani | ... | Sara (1 episode) |
| J.J. Abrams | ... | Man on the phone saying 'Joey's Pizza' (voice) (1 episode) |
| John Aylward | ... | Jeffrey Davenport (1 episode) |
| Keone Young | ... | Professor Choy (1 episode) |
| Elaine Kagan | ... | June Litvack (1 episode) |
| Mark Rolston | ... | Seth Lambert (1 episode) |
| Carole Gutierrez | ... | Laura Stenson (1 episode) |
| J.J. Abrams | ... | Creator(s) |
| 2.01 | The Enemy Walks In | |
| 2.02 | Trust Me | |
| 2.03 | Cipher | |
| 2.04 | Dead Drop | |
| 2.05 | The Indicator | |
| 2.06 | Salvation | |
| 2.07 | The Counteragent | |
| 2.08 | Passage: Part 1 | |
| 2.09 | Passage: Part 2 | |
| 2.10 | The Abduction | |
| 2.11 | A Higher Echelon | |
| 2.12 | The Getaway | |
| 2.13 | Phase One | |
| 2.14 | Double Agent | |
| 2.15 | A Free Agent | |
| 2.16 | Firebomb | |
| 2.17 | A Dark Turn | |
| 2.18 | Truth Takes Time | |
| 2.19 | Endgame | |
| 2.20 | Countdown | |
| 2.21 | Second Double | |
| 2.22 | The Telling |