Bill Turnbull investigates one of the biggest mysteries in the countryside: what is killing the bees? It is a question that generates huge controversy. Changes in the weather, pesticides and even a deadly virus have all been blamed. It is a problem that Turnbull is all too familiar with as a beekeeper himself. He meets the scientists who are fitting minute radar transponders on to bees to try to find answers.

Streaming video file encoded with permission for digital streaming by Infobase on October 01, 2015.

Introduction: What's Killing Our Bees? --(1:38) -- Bee Facts -- (2:21) -- Bee Loss across England -- (3:25) -- Bee-Free Meal -- (2:52) -- Varroa Destructor -- (3:43) -- Bee Tracking System -- (4:06) -- Flight Study of Infected Bees -- (3:00) -- Variety of Bees -- (3:11) -- Neonicotinoid Pesticides -- (3:31) -- Controlled Bee Study -- (5:32) -- Value of Insecticides -- (3:20) -- Wild Bumblebee Pesticide Exposure -- (5:14) -- Meadow and Grasslands Disappearing -- (4:19) -- Potential Solutions -- (3:29) -- Final Thoughts: What's Killing Our Bees? -- (1:01) -- Credits: What's Killing Our Bees? -- (0:46) -- Demo What is Killing our Bees? -- (1:00) -- Steve's Clip -- (1:00).