WTTW split the story into two episodes, with the break occuring during episode four when the Doctor points out to Hart that the submarine signal is heading towards the beach near the prison. [source: ChicagoEpguides]

Outro: You and I, confronted on three sides by guards, a minefield, and a Sea Devil, the fourth side by the ocean, might consider tallying our life insurance. But then neither you nor I are The Doctor, who, with Jo, will undoubtedly conceive an alternative course. How advocacious it is remains to be seen, but not for a week, when we bring you the conclusion of "The Sea Devils." [source: ChicagoEpguides]