What on Earth?

11:00 PM to 12:00 AM

Monday 21 July

Ghost of Zorro

Season 3 Episode 9 of 20

A giant letter Z is carved into a Mexican hillside evoking the mark of a legendary outlaw. Plus, a strange sighting in Germany points to secrets from the Cold War

What on Earth? airs on Sky History HD at 11:00 PM, Monday 21 July. (Subtitles.)

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