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Watch The Secret Genius of Modern Life Season 2 Episode 1 online — it may be available on legal streaming platforms such as YouTube, Netflix, Prime Video, Hulu, Disney+, and others.

Hannah gains access to a top-secret site where anonymous staff and the latest tech work to make the British passport one of the most secure documents on the planet. She reveals the World War I spy craft hidden in the pages of every passport and takes a look into how modern ID checks were shaped by the hunt for a 19th-century French serial killer and 1970s psychedelic art.