Hawaii Five-0: Season 9, Episode 18

9 - 18: Ai no i ka 'ape he mane'o no ko ka nuku (He Who Eats ‘Ape is Bound to Have His Mouth Itch)

(He Who Eats 'ape is Bound to Have His Mouth Itch) Tani and Junior go undercover at a gym to track down a deadly batch of steroids that’s killing users, before the drugs claim any more victims. Also, Danny and McGarrett sub as bodyguards for Danny’s high maintenance ex-mother-in-law, Amanda Savage, a wildly famous romance novelist with whom he has never gotten along.