Know Your S**t: Inside Our Guts

Channel 4, 8pm Poop-snoop identical twins Lisa Macfarlane and Alana Macfarlane Kempner are in Liverpool, visiting the School of Tropical Medicine to hear about – and see – some of the nastiest and most dangerous parasites that survive and thrive in the human gut. They also meet a gastrointestinal pathologist to find out what’s behind a recent spike in cases of bowel cancer. Important information makes up for the sometimes jarringly lighthearted tone about serious matters.