Sydney Bristow, an agent who has been tricked to believe she is working for the U.S. government, is actually working for a criminal organization named the Alliance of Twelve. Upon learning this, Sydney becomes a double agent for the real CIA.
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The peak run. Top 40% of seasons by average rating — consecutive, with an average of 8.19.
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Jennifer Garner
Sydney Bristow
Victor Garber
Jack Bristow
Ron Rifkin
Arvin Sloane
Carl Lumbly
Marcus Dixon
Kevin Weisman
Marshall Flinkman
Rachel Nichols
Rachel Gibson
Amy Acker
Kelly Peyton
Balthazar Getty
Thomas Grace
All 105 episodes plotted by IMDb rating
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22 episodes • 2001Avg: 8.2Golden Era
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | Truth Be Told | Sep 30, 2001 | 8.8 |
| 2 | So It Begins | Oct 7, 2001 | 8.3 |
| 3 | Parity | Oct 14, 2001 | 7.8 |
| 4 | A Broken Heart | Oct 21, 2001 | 8.0 |
| 5 | Doppelgänger | Oct 28, 2001 | 8.2 |
| 6 | Reckoning | Nov 18, 2001 | 7.9 |
| 7 | Color Blind | Nov 25, 2001 | 8.0 |
| 8 | Time Will Tell | Dec 2, 2001 | 8.1 |
| 9 | Mea Culpa | Dec 9, 2001 | 8.4 |
| 10 | Spirit | Dec 16, 2001 | 8.0 |
| 11 | The Confession | Jan 6, 2002 | 8.1 |
| 12 | The Box (1) | Jan 20, 2002 | 8.8 |
| 13 | The Box (2) | Feb 10, 2002 | 8.8 |
| 14 | The Coup | Feb 24, 2002 | 8.1 |
| 15 | Page 47 | Mar 3, 2002 | 8.0 |
| 16 | The Prophecy | Mar 10, 2002 | 8.2 |
| 17 | Q & A | Mar 17, 2002 | 8.0 |
| 18 | Masquerade | Apr 7, 2002 | 8.2 |
| 19 | Snowman | Apr 14, 2002 | 8.2 |
| 20 | The Solution | Apr 21, 2002 | 8.1 |
| 21 | Rendezvous | May 5, 2002 | 8.3 |
| 22 | Almost Thirty Years | May 12, 2002 | 8.7 |
22 episodes • 2002Avg: 8.2Golden Era
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | The Enemy Walks In | Sep 29, 2002 | 8.7 |
| 2 | Trust Me | Oct 6, 2002 | 8.0 |
| 3 | Cipher | Oct 13, 2002 | 8.1 |
| 4 | Dead Drop | Oct 20, 2002 | 7.9 |
| 5 | The Indicator | Nov 3, 2002 | 8.0 |
| 6 | Salvation | Nov 10, 2002 | 8.1 |
| 7 | The Counteragent | Nov 17, 2002 | 7.7 |
| 8 | Passage (1) | Dec 1, 2002 | 8.6 |
| 9 | Passage (2) | Dec 8, 2002 | 8.0 |
| 10 | The Abduction | Dec 15, 2002 | 7.9 |
| 11 | A Higher Echelon | Jan 5, 2003 | 8.3 |
| 12 | The Getaway | Jan 12, 2003 | 7.9 |
| 13 | Phase One | Jan 26, 2003 | 8.8 |
| 14 | Double Agent | Feb 2, 2003 | 8.1 |
| 15 | A Free Agent | Feb 9, 2003 | 7.9 |
| 16 | Firebomb | Feb 23, 2003 | 8.0 |
| 17 | A Dark Turn | Mar 2, 2003 | 7.9 |
| 18 | Truth Takes Time | Mar 16, 2003 | 8.3 |
| 19 | Endgame | Mar 30, 2003 | 8.1 |
| 20 | Countdown | Apr 27, 2003 | 8.0 |
| 21 | Second Double | May 4, 2003 | 8.4 |
| 22 | The Telling | May 4, 2003 | 8.6 |
22 episodes • 2003Avg: 8.0
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | The Two | Sep 28, 2003 | 8.3 |
| 2 | Succession | Oct 5, 2003 | 7.7 |
| 3 | Reunion | Oct 12, 2003 | 7.7 |
| 4 | A Missing Link | Oct 19, 2003 | 8.1 |
| 5 | Repercussions | Oct 26, 2003 | 8.0 |
| 6 | The Nemesis | Nov 2, 2003 | 7.9 |
| 7 | Prelude | Nov 9, 2003 | 7.7 |
| 8 | Breaking Point | Nov 23, 2003 | 8.1 |
| 9 | Conscious | Nov 30, 2003 | 8.3 |
| 10 | Remnants | Dec 7, 2003 | 8.2 |
| 11 | Full Disclosure | Jan 11, 2004 | 8.7 |
| 12 | Crossings | Jan 18, 2004 | 8.0 |
| 13 | After Six | Feb 15, 2004 | 7.9 |
| 14 | Blowback | Mar 7, 2004 | 8.0 |
| 15 | Façade | Mar 14, 2004 | 8.0 |
| 16 | Taken | Mar 21, 2004 | 8.0 |
| 17 | The Frame | Mar 28, 2004 | 8.0 |
| 18 | Unveiled | Apr 11, 2004 | 8.1 |
| 19 | Hourglass | Apr 18, 2004 | 7.9 |
| 20 | Blood Ties | Apr 25, 2004 | 7.6 |
| 21 | Legacy | May 2, 2004 | 7.7 |
| 22 | Resurrection | May 23, 2004 | 8.0 |
22 episodes • 2005Avg: 7.8
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | Authorized Personnel Only (1) | Jan 5, 2005 | 7.9 |
| 2 | Authorized Personnel Only (2) | Jan 5, 2005 | 7.8 |
| 3 | The Awful Truth | Jan 12, 2005 | 8.0 |
| 4 | Ice | Jan 19, 2005 | 7.9 |
| 5 | Welcome to Liberty Village | Jan 26, 2005 | 8.4 |
| 6 | Nocturne | Feb 9, 2005 | 7.7 |
| 7 | Détente | Feb 16, 2005 | 7.5 |
| 8 | Echoes | Feb 23, 2005 | 7.9 |
| 9 | A Man of His Word | Mar 2, 2005 | 7.6 |
| 10 | The Index | Mar 9, 2005 | 8.1 |
| 11 | The Road Home | Mar 16, 2005 | 7.5 |
| 12 | The Orphan | Mar 23, 2005 | 7.4 |
| 13 | Tuesday | Mar 30, 2005 | 8.1 |
| 14 | Nightingale | Apr 6, 2005 | 7.9 |
| 15 | Pandora | Apr 13, 2005 | 7.8 |
| 16 | Another Mister Sloane | Apr 20, 2005 | 7.9 |
| 17 | A Clean Conscience | Apr 27, 2005 | 7.9 |
| 18 | Mirage | May 4, 2005 | 7.9 |
| 19 | In Dreams... | May 11, 2005 | 7.6 |
| 20 | The Descent | May 18, 2005 | 7.8 |
| 21 | Search and Rescue | May 18, 2005 | 7.9 |
| 22 | Before the Flood | May 25, 2005 | 8.1 |
17 episodes • 2005Avg: 7.9
| # | Episode | Air Date | Rating |
|---|---|---|---|
| 1 | Prophet Five | Sep 29, 2005 | 8.2 |
| 2 | ...1... | Oct 6, 2005 | 7.9 |
| 3 | The Shed | Oct 13, 2005 | 8.0 |
| 4 | Mockingbird | Oct 20, 2005 | 8.1 |
| 5 | Out of the Box | Oct 27, 2005 | 7.6 |
| 6 | Solo | Nov 10, 2005 | 8.1 |
| 7 | Fait Accompli | Nov 17, 2005 | 7.8 |
| 8 | Bob | Dec 7, 2005 | 7.6 |
| 9 | The Horizon | Dec 14, 2005 | 7.8 |
| 10 | S.O.S. | Apr 19, 2006 | 8.0 |
| 11 | Maternal Instinct | Apr 19, 2006 | 7.9 |
| 12 | There's Only One Sydney Bristow | Apr 26, 2006 | 7.9 |
| 13 | 30 Seconds | May 3, 2006 | 7.9 |
| 14 | I See Dead People | May 10, 2006 | 7.9 |
| 15 | No Hard Feelings | May 17, 2006 | 7.9 |
| 16 | Reprisal | May 22, 2006 | 7.9 |
| 17 | All the Time in the World | May 22, 2006 | 7.9 |
