007: Road to a Million S01 E08 EPISODE EIGHT

"Ordinary people. Epic adventure."

After being dropped high in the Swiss Alps the pairs face a gruelling off-piste hike across the freezing slopes in waist deep snow to a remote ice lake. They discover The Controller has rigged a question case with high explosives. The only way to continue is to shoot it down before it detonates, and their journey is over.