The programme is not in fact about a childlike faith; but consists of a number of adults of different faiths (RC, Bahai, Mormon, Muslim etc.) talking about what it was like growing up in that faith and how they came to reject/pursue this as they became adults.
Thanks for the recommendation Mishap. I like to listen on radio iplayer on my iPad when I go to bed (headphones on so no disturbing dh! He does similar but at 5.30 am!!!), so will try this tonight. Its a good thing to learn a bit more about other faiths I think.