Legend of the Sea Devils (S13E08)

Swashbuckle your seatbelts – the Doctor is back for an action-packed adventure as she comes face to fin with one of her oldest adversaries: the Sea Devils! Beneath the oceans of the 19th century lurk terrifying forces. Why has legendary pirate queen Madam Ching come searching for a lost treasure in a remote coastal village? The Doctor, Yaz and Dan must battle deadly sea monsters, flying pirate ships and a plan that will threaten the entire planet, in Jodie Whittaker’s penultimate story as the Doctor. (BBC)