In this final episode, we're looking to the future. The Oceans Treaty which was finally passed last year after decades of negotiations was momentous - but what actually is it? And will it do anything? Senior Policy Advisor Lisa Speer was at the UN HQ in New York when the announcement was made,...

Everyone knows the oceans are changing. Sea levels are rising, the water's heating up, coral is bleaching. But away from the scary stats, what do the changing oceans actually look like - what impact are they having on us now? Hannah is joined by climate activist Shaama Sandooyea, who explains how...

Hannah's been getting updates from onboard the Arctic Sunrise, one of Greenpeace's research ships, since the beginning of the series - from Panama where it set sail out into the Galápagos Islands marine reserve. We heard as it crossed the equator, and we've learnt about the pioneering research...