The annual fire festival Up Helly Aa gets under way with a traditional visit to the hospital from the squads of men dressed in Viking garb. It is a night to remember for one reveller, who ends up in A&E with serious burns after an accident with a kettle. A specialist retrieval team beats the weather to get to a critically ill patient who needs urgent treatment on the mainland. And an 84-year-old marathon runner is stopped in his tracks by a fall that breaks his hip. But after an operation, he is determined to get back to fitness.