I'm afraid I don't know,but I was going to mention this anyway:

It's not about Stonehenge, but you (and others) might like Aubrey Manning's 'Landscape Mysteries' series which is being repeated starting next tuesday (19th)
http://www.open2.net/landscapemysteries/tv_summaries.html

and then when I looked further at the site I spotted you can hear a podcast and watch some clips from a timewatch programme about Stonehenge (though as I recall this programme was pretty appalling in the way it leapt about making grand inferences about Healing)
http://www.open2.net/timewatch/2008/stonehenge.html

I think National Geographic seem to have done a documentary too. (er I haven't seen that either.._)

Isn't that the one with Julian Richards? It's been a while but from memory it's a good experiment and uses reliable information, not whishy washy stuff.
National Geographics docu about the Stonehenge Riverside Project first broadcast this time last year and narrated by Donald Sutherland is a fairly well put together docu about the project itself and stuck to the facts that were being uncovered. There was the odd little thing that seemed to be put in for dramatic licence that slightly bewildered my colleagues and myself (I've just fininshed working for NT at Stonehenge), but it seemed ok overall.
This year there should be a new NOVA documentary about last years Riverside Project, and a Time Team Special as well.
There's another documentary that I can't remember the name of featuring Mike Pitts as he creates Foamhenge, and although it seems a rather gimicky concept it's actually really good.
Don't watch the Timewatch Bluestones documentary, unless you want to get really really angry.

The Nat Geo programme was broadcast on 1st June 2008 and again at the end of March 2009. The NG magazine June 2008 has some useful info including an artists impression of the neolithic house floor first discovered in 2005.

The programme excludes any mention of the bluestones!!!

The Time Team Special will be broadcast in June 2009.

The Nova programme will be on PBS in the USA in Jan/Feb Mar of 2010. they're do some filming again in June.

The SRP will be digging from the 15th August- 6th September 2009. There will be only one trench and sadly that will be on private land so no access sadly.