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Part 1

Episode number: 1

Overview: It’s peacetime in the Gulf of Mexico, so why is the USS Pennsylvania running weapons drills?

Part 2

Episode number: 2

Overview: A man’s dead. Something’s going on. Something bad.

Part 3

Episode number: 3

Overview: Penetrate the skull. It’s the only way to stop them.

Part 4

Episode number: 4

Overview: Advance quickly. Stick together. Do not fire unless you absolutely must.

Part 5

Episode number: 5

Overview: Riley does what needs doing.

Part 6

Episode number: 6

Overview: Riley and the remaining USS survivors have one mission: Survive.