Professor Marcus du Sautoy explores why we are driven to measure and quantify the world around us. He begins by telling the story of the metre and the second. Show more

Marcus du Sautoy explores the history of Le Grand K - the world's master kilogramme - and the race to replace it now that it has been discovered to be losing weight. Show more

From lightning bolts to single electrons, Marcus du Sautoy reveals how we came to measure and harness the power of heat, light and electricity. Show more

No players, no staff and no league to play in – can Robbie Savage and local businessman Rob Smethurst build a new club from the ashes of the liquidated Macclesfield Town? Show more

Can local businessman Rob Smethurst and former footballer Robbie Savage guide Macclesfield FC to promotion to the eighth tier of English football at the first attempt? Show more

Documentary following marine biologist Andrea Marshall as she studies manta rays, one of the most intelligent creatures in the ocean. Show more

Dr Ingrid Visser investigates why there has been an unusual number of whale deaths, and reveals disturbing new information. Show more