I just discovered that there is a new three-part series, The Genius of Charles Darwin, that was broadcast on UK Channel 4. I tried to buy the episodes on iTunes, but they are only available in the UK. Luckily they are all posted on YouTube.
Below is the first part (of five) of the first episode, available on YouTube.
You can read more about the episodes and find more links at RichardDawkins.net.
Tree pruning - man with a machete
3 hours ago in The Phytophactor