Flynn and Vega investigate a suspicious suicide, but Angie gets distracted by the arrival of Mark Cross.
What looks like a self-defense case turns out to be something much more calculated; Cross tries to establish himself in his new position.
Angie and Oscar try to solve a mystery when a socialite drowns and are led to an unlikely killer.
One of the team's own is murdered, causing Sgt. Cross to cross the line between professional and personal.
Angie takes an aggressive approach to solve the murder of a high school student; Lucas and Sung's relationship gets personal.
The team tries to find a missing and injured bartender and Flynn feels guilty about leaving Vega out of the action.
Angie is forced to leave her father's wedding to investigate a skydiving jump gone wrong and tries to regain Vega's trust by sharing information about Sergeant Cross.