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In chapter seven of S.O.S. Coast Guard, guardsman Terry Kent (Ralph Byrd) is revealed to have survived the crash of the water tower at the Pierport Station. His objective of smuggling disintegrating gas in light bulbs thus having failed, Boroff (Bela Lugosi) sends his henchman, Thorg (Richard Alexander), back to the sunken S.S. Carfax to retrieve the gas hidden in cases marked "kerosene." Diving for the wooden crates, Thorg is interrupted by Kent, who has learned of the activity from a couple of captured gang members. There is a furious underwater struggle and as the chapter reaches its conclusion, Thorg manages to destroy Terry's diving gear.