Hawaii Five 0 — Episode 15: He waha kou o ka heʻe (Yours is the Mouth of an Octopus)

You are watching the episode He waha kou o ka heʻe (Yours is the Mouth of an Octopus) When Grover's niece, Siobhan goes missing from the police academy and it's discovered her boyfriend is an undercover member of the Yakuza, Adam may be her only hope of rescue.