Sci. Ch. - What on Earth? Series 3 (2016-2017) Part 6 Ghost of Zorro

What on Earth? Series 3

Eyes in the sky. Watching us from space. Hundreds of satellites showing us the world like we've never seen it before. Capturing images which are breathtaking but bizarre. Objects and phenomena which defy explanation. Baffling phenomena seen from space, what on Earth are they?

Part 6 Ghost of Zorro

A giant letter Z is carved into a Mexican hillside, evoking the mark of a legendary outlaw; a strange sighting in Germany points to secrets from the Cold War; and massive, blood-red marks in China prompt fears of a violent government crackdown.

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