Summer is rolling into Kew Gardens, and the giant waterlilies are once again drawing the crowds, who come to marvel at their size. This year, Carlos and Lucy think they've discovered a new third species of giant waterlily previously unknown to science. We follow them as they gather the evidence, along with partners in Bolivia, to try and prove their discovery to the world, and also see how Brie handles the monster-sized lily pads, when they take over the Waterlily House. Aaron is looking at ways to replace coffee plants threatened with extinction by climate change, pests and disease. With the future of our favourite beverage in his hands, we follow Aaron from the labs at Kew to the plantations of Uganda, and onto a coffee roaster in Bristol to find the perfect new brew. The stakes are high: if Aaron fails, it could mean no more coffee for any of us. We also find out from garden and plant historian Advolly how Kew had previously helped with a Victorian coffee crisis, and how Kew's first