Chris Sheffield

The team turns to Holly Snow for help when a Navy officer's death is connected to a prostitute.

After an explosion blasts through a small town school, the team attempt to locate the bomber before another attack occurs.

Capt. Tom Chandler and his crew set out for the Arctic with two virologists, and Chandler discovers that the virologists are collecting samples of the source of a virus that has wiped out more than half of the human population.

A ground mission to Guantanamo Bay takes a turn for the worse when Chandler and his comrades are attacked by escaped prisoners.

The ship's propulsion system suffers a catastrophic event and Chandler's leadership and ingenuity are put to the test.

Callie goes to Judge Wilson's friendly barbecue; Mariana deals with a lack of diversity; Alice struggles with her responsibilities.