It was cringe-worthy, quite dull, and sadly not very compelling...It was an excruciating few minutes while the London moderators tried to keep the audience of about 100 in the small LSE auditorium busy with impromptu stand-up. We would hear a telephone ring, they said, and it would be Al.
Videos of republican US congressmen and anchormen from Fox News making entertaining statements about climate change pepper the segment on sceptics arguments. Each one, we are told, is a red herring (cue animated .gif of a red fish). Animated .gifs of large red fish are repeatedly contrasted with the word REALITY, writ large on a black background.
I'll spare you the rest - highlights from each city can be viewed online if you're curious. But the trouble is: it's dull. It's all been done and seen before, often better. (Dare I mention: if you want to see detailed explanations of classic sceptical arguments, see our own Climate Myths.)
But I'm still left with the overwhelming feeling that Gore's time is over. As Mike Shanahan of the International Institute for Environment and Development puts it: "climate change needs a Gandhi or a Martin Luther King or a Mandela, and Al Gore is none of those".