Lying on the remote north west coast of England is one of the most secret places in the country - Sellafield, the most controversial nuclear facility in Britain. Now, Sellafield are letting nuclear physicist Professor Jim Al-Khalili and the television cameras in to discover the real story. Inside, Jim encounters some of the most dangerous substances on earth, reveals the nature of radiation and even attempts to split the atom. He sees inside a nuclear reactor, glimpses one of the rarest elements in the world - radioactive plutonium - and even subjects living tissue to deadly radiation. Ultimately, the film reveals Britain's attempts - past, present and future - to harness the almost limitless power of the atom.

It s a small world after all. In this revolutionary new series, David Attenborough reveals the marvellous adaptability of the most successful group of animals on the planet. Using pioneering macroscopic filmmaking techniques, he explores in unparalleled detail the intricate, sophisticated behaviours of these fascinating creatures and the complexity of the environments they build and inhabit, in a world normally hidden from the human eye. From armies of killer ants to spiders weaving silken trap doors, ferocious scorpions with paralysing stings, beetles shooting boiling chemicals at their enemies, bees communicating with a waggle dance and assassin bugs that clothe themselves in their victims corpses; David Attenborough will as never before take viewers deep into the macroscopic world of bugs.

Dallas Campbell explores the equation which attempts to calculate the number of planets supporting life in our universe.