Season
- Season 0 2001-04-24
- Season 1 1983-01-16
- Season 2 1984-01-15
- Season 3 1985-01-14
- Season 4 1986-01-20
- Season 5 1987-01-26
- Season 6 1987-12-14
- Season 7 1988-10-09
- Season 8 1989-11-27
- Season 9 1990-09-11
- Season 10 1991-10-14
- Season 11 1992-10-12
- Season 12 1993-10-11
- Season 13 1994-10-17
- Season 14 1995-10-16
- Season 15 1996-10-07
- Season 16 1997-10-06
- Season 17 1998-09-20
- Season 18 1999-09-27
- Season 19 2000-10-01
- Season 20 2001-09-12
- Season 21 2002-09-02
- Season 22 2003-10-08
- Season 23 2004-09-16
- Season 24 2005-10-04
- Season 25 2006-10-02
- Season 26 2007-10-15
- Season 27 2009-01-01
- Season 28 2010-02-01
- Season 29 2010-10-18
- Season 30 2011-10-10
- Season 31 2013-01-07
- Season 32 2014-01-06
- Season 33 2015-01-05
- Season 34 2016-01-04
- Season 35 2016-09-26
- Season 36 2017-10-18
- Season 37 2018-07-30
- Season 38 2019-09-30
- Season 39 2020-07-20
- Season 40 2021-01-07
- Season 41 2022-02-14
- Season 42 2023-01-02
- Season 43 2024-01-22
- Season 44 2025-01-21
Season 44 Episode
- Season 21 Faith and Doubt at Ground Zero
- Season 21 Campaign Against Terror
- Season 21 The Man Who Knew
- Season 21 Missile Wars
- Season 21 A Crime of Insanity
- Season 21 Let's Get Married
- Season 21 In Search of Al Qaeda
- Season 21 Much Ado About Something
- Season 21 A Dangerous Business
- Season 21 Failure to Protect: The Taking of Logan Marr
- Season 21 Failure to Protect: The Caseworker Files
- Season 21 China in the Red
- Season 21 The War Behind Closed Doors
- Season 21 The Long Road to War: A FRONTLINE Special Report
- Season 21 Blair's War
- Season 21 Kim's Nuclear Gamble
- Season 21 Cyber War!
- Season 21 Burden of Innocence
- Season 21 The Wall Street Fix
- Season 21 The Other Drug War
- Season 21 Public Schools, Inc.
Frontline - Season 21 Episode 3 The Man Who Knew
7.40 55 minutes When the Twin Towers fell on September 11, 2001, among the thousands killed was the one man who may have known more about Osama bin Laden and Al Qaeda than any other person in America: John O'Neill.
