To some fusion is a low carbon energy unicorn. You could spend all your life and all of your money tracking it, but you'll never harness it. To others, it's the solution the world has been waiting for. But the majority seem to neither know nor care what fusion is and it's high time that changed.

Hosted by Angela Lamont, technology journalist and featuring Sir Steven Cowley, Princeton; Mark Henderson, ITER; Nick Hawker, First Light Fusion; David Kingham, Tokamak Energy; Christophe Junillon, Atkins; and Bogdan Gagea from BP.