Anton Narinskiy

The 126 race into action when a major train derailment causes multiple injuries; Tommy makes a bold move in her relationship with Trevor; Wyatt asks Owen to give Judd his job back.

The 126 race to contain a toxic chlorine cloud of death unleashed by the train derailment; Owen names the station's new lieutenant.

The team heads to Austin to investigate when victims with watches set to inaccurate times are discovered; the team's stalker gets closer.

After several of Bailey's patients die, she becomes the focus of a CDC investigation; Cristina teases Alex about his feelings for Jo; Owen continues to take care of Ethan while his parents remain in the hospital.

A heavy body is found forty feet up a tree surrounded by marijuana when Dr. Morales shows up with his father, a retired detective from Uruguay; Julio Sanchez works to get legal guardianship of Mark Jarvis; Andy Flynn prepares a surprise for Sharon.

The murder of a Navy machinist sends the team on a citywide hunt for evidence; Anna Kolcheck (Bar Paly) partners with Callen and Sam in the on-going mole investigation.