James Chen

Maggie goes under cover working in a bar to investigate an anti-government group that regularly gathers there; a single father on the periphery of the group begins to fear he's in danger of becoming collateral damage.

The team hunts for a serial killer who is targeting young, homeless men; Tiffany and Scola don't see eye to eye on how to handle the case.

The team must infiltrate a drug trafficking gang after the robbery of a chemical plant leaves two customs agents dead; Nestor offers his help on the case, giving Maggie new insight into his character.

A killer is using drug mules to exploit airport security checkpoints; OA struggles to cope with the aftermath of the sarin gas exposure and the 10th anniversary of his army friend's death in Afghanistan.

After a bomb detonates at a restaurant in Queens, the case becomes personal for OA, who grew up eating there; OA goes under cover to prevent another incident.

After a senator's daughter is kidnapped and held for ransom, the FBI must find the little girl before their time limit expires; they must dig into the senator's past for clues to who did this to his family.