Still Chasing Saddam's Weapons was broadcast on BBC One on Sunday, 23 November, 2003 at 2215 GMT.
Panorama has secured exclusive access to the secret and controversial work of the Iraq Survey Group as they hunt for Saddam's weapons of mass destruction.
The failure so far to find the weapons the politicians insisted were there has been an embarrassment to Tony Blair and George Bush.
Iraqi scientists and officials, once part of the regime, give Panorama their assessment of whether Saddam really posed a threat to the west and reveal details of one of Iraq's illicit weapons programmes.
Reporter: Jane Corbin
Producers: Fiona Campbell and Thea Guest
Deputy Editors: Andy Bell, Sam Collyns
Editor: Mike Robinson