In a swashbuckling special adventure, the Doctor, Yaz and Dan come face to fin with one of the Doctor’s oldest adversaries: the Sea Devils.

An old enemy is rising from the depths…

Why has legendary pirate queen Madam Ching come searching for a lost treasure? What terrifying forces lurk beneath the oceans of the nineteenth century? And did Yaz really have to dress Dan up as a pirate?

Doctor Who airs BBC One on 17 April at 7.10pm