From the Chhatrapati Shivaji Terminus in Mumbai, Dan Snow, Anita Rani and Robert Llewellyn explore the science behind the world's busiest railway. With John Sergeant reporting from across India.
Production companies：
BBC Four
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BBC Studios Science Unit
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Overview：From the Chhatrapati Shivaji Terminus in Mumbai, Dan Snow, Anita Rani and Robert Llewellyn explore the science behind the world's busiest railway. With John Sergeant reporting from across India.
