PG certificateDrain the Oceans is a Nature programme and has been classified a PG certificate.

Image for episode "Secrets of the Spanish Armada" from Nature programme "Drain the Oceans"

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Drain the Oceans: Secrets of the Spanish Armada

Series 2, episode 7

Experts find a secret beneath the waves, of how the Armada's failed conquest sparked England to steal the latest Spanish ship designs to grow their empire