A really good one is a summary of his hit book the God Delusion, which will first be broadcast on Wednesday 25th Aug at 9pm.
Synopsis:
"In this controversial two-part series, Dawkins describes God as the most unpleasant fictional character of all and launches a wholehearted attack on religion as the cause for much of the pain and suffering in the world."
Or watch the whole Age of Reason series on 4OD (LINK)
