A fascinating character. Exquisite sets. A wig for every era. The stars, creators and crew reveal how the hit series about a chess prodigy came to life.

When Canadian director Sturla Gunnarsson set upon Iceland to film Beowulf & Grendel starring Gerard Butler and Stellan Skarsgard in 2004, they expected the usual complication involved in making a movie, but what they encountered made them wonder if the Norse gods were actually working against them.