Winterwatch Know Your S**t: Inside Our Guts
BBC Two, 8pm
The Winterwatch team are back with more nature treats and sightings of badgers and wildfowl as Chris Packham and Michaela Strachan set up camp at Wild Ken Hill in Norfolk, while Iolo Williams and Gillian Burke are in Edinburgh for some urban wildlife stories.
Channel 4, 8pm
The eye-catching title belies a serious subject in this new popular science series about good gut health, where twin-sister presenters Alana Macfarlane Kempner and Lisa Macfarlane meet people willing to talk on national television about their bowel problems, from chronic constipation to bowel cancer. The tone is relentlessly upbeat – it’s filmed at the cringingly named “Poo HQ” – but dietician Sophie Medlin and gastroenterologist Rabia Topan are on hand to dish out sound advice.