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Dangerous Earth

Episode 3: Lightning

Duration: 30 minutes

on BBC Four HD

Dr Helen Czerski examines the hottest natural phenomenon on the planet - lightning. High-speed cameras show the secrets of upward lightning that's triggered by urban landscapes. Show more

BBC Four HD

About BBC Four

BBC Four reflects arts, music and culture with an ambitious range of intellectually and culturally enriching programmes, taking an expert and in-depth approach to its subjects.