Here's the full documentary
http://www.youtube.com/watch?v=wzxms9-qQZ4

and where you can buy it
http://www.bornfree.org.uk/shop/acat..._and_DVDs.html
http://www.fatheroflions.org/BooksVideosDVDs.html

and a message from Will Travers, Bill's son.
http://www.bornfree.org.uk/blog/?p=105

and if you'd like to watch just the end without that annoying music
http://www.youtube.com/watch?v=adYbFQFXG0U