James Chen

Look back at how Chimney joined Station 118 and became the firefighter and paramedic he is today.

When Colin learns his CIA mentor has gone dark, he enlists Bill and the team to help track them down; as they get closer, the operation reveals significant information about the identity of the mole.

After meeting with federal agents in a dark edge of Chinatown, Jamie witnesses a crime in progress and his suspect is killed while in pursuit. Now, Danny must solve the case in order for Jamie to avoid an Internal Affairs investigation.

When a top-secret weapon is stolen in broad daylight from a U.S. defense contractor, CIA agent Colin Glass is paired with FBI agent Bill Goodman to investigate.

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.

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.