Matt Baker is in Cornwall to meet Julian Jackson, who lost his sight in 2010 and is raising money for a vision charity by walking from Land's End to John O'Groats, following spring as it spreads northwards through the country. Ellie Harrison hears about a project that has brought beavers back to the riverbanks of Cornwall after a 400-year absence. Steve Brown takes to the warm spring waters in a catamaran, hoping to spot some seasonal marine life. Tom's looking at why farmers can be at high risk of suicide and discovers what's being done to help one particular group. Adam and Charlotte meet up with the first of three finalists as they search for the Countryfile Farming Hero for 2018.