(The MASTER hastily switches the device off.) COMMANDER MITCHELL: Sir, shouldn't we try and jump them? DOCTOR: (To BLYTHE.) The SEA DEVIL starts to run after the DOCTOR and JO.
Plan: A: The Sea Devils; Q: Who attacked the island prison and rescued the Master? A: the island prison; Q: Where did the Sea Devils attack? A: the Master; Q: Who did the Sea Devils rescue? A: the Doctor; Q: Who ventures underwater to try to contact the Sea Devils? Summary: The Sea Devils attack the island prison and rescue the Master, prompting the Doctor to venture underwater to try and contact them.