Chris Sheffield

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

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

The team investigate after a group of teens discover a dead woman behind the wheel of an abandoned car in a Nevada ghost town.

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

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.

Callie finds herself in a difficult position; Mariana gets information from an unlikely ally; Sumi's wedding day arrives.