Just caught up with this (a few years late!), and I'm afraid I was really disappointed. No distinction between traditional, Victorian, Revival-era and contemporary songs; they were all Sea Songs, they were all sung by good honest seafaring folk, probably, some of the time, and they were all lovely. I don't expect every arts documentary to be Kenneth Clark's Civilisation, but this just struck me as muddleheaded and superficial. Gareth Malone was engaging, though, and there was some great singing along the way.