incorrect. Nelson and Emery's plan is rejected. The Admiral and the Commodore quickly leave the proceedings intending to get authorization directly from the President himself. The Seaview races to reach the optimal firing position above the Pacific Ocean's Marianas trench in time for the needed angle of trajectory. Nelson and Crane attempt tapping the Rio-to-London telephone cable in an attempt to reach the President. During the cable tapping attempt, Crane and Alvarez battle a giant squid. They can only tap into the London cable, and Nelson learns there has been no contact with the U.S. for 35 hours. An unsuccessful attempt on the Admiral's life indicates a saboteur is aboard. The rescued scientist, Miguel Alvarez, a religious zealot regarding the catastrophe, is the suspected saboteur. Dr. Hiller, who privately supports Dr Zucco's plan, is another suspect. Other obstacles present themselves. The Seaview's main generator is sabotaged by a crew member who lost his mind, forcing Nelson to order Crane to proceed while repairs are made despite the risk of proceeding without power for the sonar and radar. As a result, the sub narrowly escapes a minefield left over from World War II. The crew are near-mutiny, to the point that when the Seaview encounters a motor ship whose crew is dead, Captain Crane and the Admiral allow any crew members who wish to leave rather than continue the mission to leave the sub and sail the derelict home. Crane begins doubting the Admiral's tactics and reasoning. A hostile, unidentified submarine pursues them, diving deep into the Mariana Trench, exceeding its crush depth; the sub implodes before it can destroy Seaview. The saboteur has shut down the sub's power. Crane encounters Dr Hiller, the saboteur, atop the shark tank, as she exits the restricted nuclear reactor core. Her radiation detector badge has turned red, showing she has been exposed to a fatal dose. When asked why, she says to prevent the sub from reaching its target. Suddenly an explosion rocks the sub, throwing Dr. Hiller into the shark tank. She is killed by the sharks. Seaview reaches the Mariana Islands in time to carry out the Admiral's plan. He learns that temperatures are rising faster than projected, proving Zucco's theory is incorrect. Alvarez, believing it is God's will for the Earth to be destroyed, attempts to sabotage the mission by threatening to explode a bomb. The nuclear missile is launched toward