Blue Planet UK

Episode 5 (1x5)

Air date: Mar 29, 2019

The final programme comes from St Abbs in Scotland and looks at whether herring - the 'silver darlings of the sea' are making a comeback this year. One man shares his passion for sea horses and Gillian investigates whether being a brave crab is a disastrous strategy. Plus there's exploration into the lesser-known British coral reefs and a reflection on life as a lighthouse keeper.