Hawaii Five-0 - Season 9 Episode 22
O ke kumu, o ka mana, ho'opuka 'ia (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.