Springwatch is back to sprinkle a little sunshine on the season. Chris Packham and Michaela Strachan are broadcasting from RSPB Arne in Dorset, where spring has finally arrived. As usual, the site is bugged with remote cameras to follow the hatchings and fledglings of the season. Iolo Williams is splitting his time between RSPB Arne and the wider Dorset area, and in this episode he's at Corfe Castle, where he has a breathtaking live nest to launch and some behind-the-scenes footage of what it takes to rig a historical monument. Megan McCubbin is at a spectacular location on the Isle of Bute, hoping to catch a glimpse of osprey as she sets off on a wild Scottish adventure.