Extreme Frontiers: Season 3: USA: Episode 2

Extreme Frontiers: Season 3: USA: Episode 2

Available on Prime Video
S3 E2: Charley rides his motorcycle to North Carolina, where he takes to the air in a replica of the Wright brothers' historic biplane and dives to the wreck of a WWI U-boat scuttled by the Germans when they realised the war was lost.