Theo Breaux

Dr. Leanne Rorish puts her new first-year residents right to work at Angels Memorial Hospital, home to the busiest ER in the nation.

A scientist is deliberately exposed to a deadly toxin at a high-security biological research facility. Before she dies, she calls Jane to ask for his help in finding her killer. Once the agents have arrived on scene, however, another empty flask of the toxin is discovered, suggesting all those inside the facility have just hours to live.

The death of a boxer leads Vance to borrow the NCIS team and start investigating the fighter's death, while Gibbs digs into Vance's past.

Christa begs Neal to perform a surgery that will ensure a patient's reproductive future; a patient fights with Mario after receiving upsetting news.

After an antiques dealer is murdered, the team recover a black book containing top secret information which leads them into a tangled web. Meanwhile, Hetty follows up on an investigation of her own.

Leanne becomes worried at the thought of losing Jesse. Mario goes against a direct order to search the city for a patient's son.