Uninterrupted and unspoiled by voice-over or music, the birdsong of sunrise in all its glory. Three different habitats, Britain's woodland, heathland and parkland, burst into song.

Dawn Chorus: The Sounds of Spring

Prof. Jim Al-Khalili tackles the biggest subject of all, the universe. Through a series of critical observations and experiments that revolutionised our understanding of our world Jim guides us through the greatest cosmic detective story of all. He takes us from the beginning of the universe to the end time and answers the question: where did the universe come from and how will it end?