The talking heads were, I believe, chosen for the purpose of making the programme more attractive to the curious viewer rather than the committed aficionado. I agree with George, BB had something to say that was relevant and interesting, the others (apart from the Waterson clan and Lucy Adams) made me cringe.
An interesting programme, I thought. As for John comments, I'm also not convinced about Eliza's own material or some of her experiments, but hey, at least she is prepared to take some risks; for me, some work, some don't (I can't stand half of Red Rice, but the other half is sublime). Next week is Kathryn Tickell. I've already seen that one, but for me it is the most interesting and enjoyable of the lot.