I’m late on this one, but then I’ve only just watched it.
The original BBC 4 link:
http://www.bbc.co.uk/iplayer/page/item/b009wynj.shtml?order=aztitle%3Aalphabetical&filter=category%3A100005&scope=iplayercategories&start=10&version_pid=b009wy81
If you don’t have broadband or the iPlayer doesn’t work for you,
It’s due to air on terrestrial TV on Friday 25 April from 9?10PM.
Of course, as with most TV broadcasts of note, it’s available worldwide within a few hours from the usual channels.