Line of Duty star Martin Compston has revealed the terrifying moment he had while filming a brand new series, as he shared behind the scenes details from the documentary. Martin Compston's Norwegian Fling is a six-part series that sees the popular BBC actor best known for a gritty police show head out on a gorgeous 2,000 mile-long trip around northern Europe with his close pal Phil MacHugh.The stars travel from Oslo to the North Arctic, experiencing incredible scenery along the way.The pair get stuck in to adventures such as zip-lining and heavy-metal concert crowd-surfing, before a special encounter with Martin and a wolf will leave viewers gobsmacked.They also spend time getting down and dirty with labour work, operating as deck hands on a fishing boat in the fjords and learning helicopter safety training.