With two murders and no strong leads, can Detective Inspector Perez and his team apprehend the suspect before crowds descend on the Shetland Islands for Up Helly Aa, the biggest fire festival in Europe?
Quest roles:
Gemma Chan(Hattie James), Alexander Morton(Joseph Wilson), Lewis Howden(Sgt Billy McCabe), Jim Sturgeon(Ronald Haldane), Lindy Whiteford(Jacky Haldane), James Greene(Andrew Haldane), Martin Wenner(Professor Paul Berglund), Alison Peebles(Vicky Kirkland), Geraldine Alexander(Gwen James), Sophie Rundle(Sophie), Finn Den Hertog(Drew), Claire Rafferty(Anna Haldane)