Deep Rai

When Lucy receives a strange call on night watch from a man admitting to murder, the team set out to find him.

Leanne and Jesse instruct a young girl on how to use a small plane's supplies to construct a makeshift defibrillator when her mum, the pilot, loses consciousness.

The team work with the Global Criminal Tribunal when a Syrian is attacked delivering incriminating evidence concerning chemical weapons. Kensi comforts Sarraf at the crime scene.

On Halloween, the squad members pull out all the stops as they compete for the title of `Ultimate Detective Slash Genius.'

Conrad works to diagnose a young woman after she is admitted due to extreme night terrors; Devon tries to survive his first Halloween in the emergency room.

When Drew's condition worsens, he needs to make sure Gina is still serious about donating her kidney and winds up making her an offer she can't refuse.