Hamza Yassin is on the west coast of Scotland in search of one of the UK's rarest marine giants - the flapper skate. This ancient species has been gliding through our waters for millions of years, but today, it teeters on the edge of extinction. Hamza joins the team using cutting-edge science and a network of sea anglers to help bring the flapper skate back from the brink. Plus, marine marvels from the Countryfile archives