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]

Intro: How does one revive a Sea Devil? It takes more than spirits of ammonia, or mouth-to-mouth resuscitation, perish the thought. The Master knows, and is intent on implementing his plan. Enter The Doctor and the struggle to save humanity from "The Sea Devils."

Outro: Guards on one side, a mine field on another, a Sea Devil on the third, and on the fourth, the ocean. What is a poor Time Lord to do? We will be apprised next Sunday night at 11 in the conclusion of "The Sea Devils." [source: ChicagoEpguides]