Fear the Walking Dead: Dead in the Water

In this prequel to "Fear the Walking Dead," Riley serves as a weapons officer aboard the USS Pennsylvania near the Gulf of Mexico when a mysterious outbreak forces the crew to strategize a way off the submarine before it becomes their tomb.
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Dead in the Water: Part 1
S1 E1

The USS Pennsylvania runs weapons drills during peacetime in the Gulf of Mexico.

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Dead in the Water: Part 3
S1 E3

Penetrating the skull is the only way to stop the enemy.

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Dead in the Water: Part 4
S1 E4

Advancing quickly; sticking together; firing is not allowed unless absolutely necessary.

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Dead in the Water: Part 5
S1 E5

Riley does what needs doing.

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Dead in the Water: Part 6
S1 E6

The new mission is to survive.