Hawaii Five-0: Season 9, Episode 22

9 - 22: O Ke Kumu, O Ka Mana, Ho'opuka 'ia (The Teacher, the Pupil – Let it Come Forth)

(The teacher, the pupil – let it come forth) While Adam investigates the murder of an undercover FBI agent about to wed the daughter of a Yakuza leader, Noelani is held hostage and forced, along with her mentor Dr. Chu, to operate at gunpoint on a criminal.