It first aired on the BBC in 2001, and was repeated in 2002, 2003, and 2004. It also aired on MSN on May 1, 2001 in the USA. See this link http://tv.msn.com/tv/episode/icons/louise-brooks.1/
The TV listing from English newspapers of the time describe it as "Fans explain the appeal of actress Louise Brooks."
I gotta see it!