ptain of USS Seaviper must go ashore to conduct reconnaissance on an island near Sumatra, but the ship is left in the hands of Mister Cutter, after the Executive Officer is injured in battle. A conflict between Cutter and the Chief of the Boat puts the submarine in jeopardy. Seaviper is trapped below the surface, with decreasing oxygen, and a Japanese destroyer hunting them from above. Damage to the boat also leave her survival in question. They must fight the Japanese destroyer and get the information about U-235 back to Pearl Harbor.

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police go insane trying to figure out what's going on. Soon, a man named Simon calls and asks for McClane. Simon tells Inspector Walter Cobb that McClane is going to play a game called "Simon Says". He says that McClane is going to do the tasks he assigns him. If not, he'll blow off another bomb. With the help of a Harlem electrician, John McClane must race all over New York trying to figure out the frustrating puzzles that the crafty terrorist gives him. But when a bomb goes off in a subway station right by the Federal Reserve (the biggest gold storage in the world) things start to get heated up.

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