Everyone but Nelson and Crane are removed from the Seaview and replaced by 8 civilians to test new equipment. One of them is a foreign agent who wants to kill everyone on board and use the ship to provoke an incident and start a war.
Did You Know?
The footage of the attack on Seaview by the drone submarine is taken directly from the movie "Voyage to the Bottom of the Sea" (1961). See more
After launching a torpedo from torpedo tube 3, two torpedoes are shown and then shown again after they launch another from torpedo tube 4. See more