Ever wondered just what on earth Up Helly Aa is all about? Well wonder no more as Marjolein Robertson takes you on a tour of Shetland's Up Helly Aa Fire Festivals in 'What the Helly Aa?' Learn about their history, what a Guizer Jarl is, what Up Helly Aa means to the communities here in Shetland and how everyone pulls together and volunteers their time and skills, year on year, to make it happen.