Nicholas Hayner

Nic and Conrad diagnose a happy husband and wife who are both admitted to the hospital with mysterious symptoms. Bell and Marshall butt heads on a work trip. A J turns down a request from Bell despite Mina's forewarning.

Sam vows to apprehend the suspect in an attack on a Navy SEAL who was moonlighting at a security job for a successful marijuana dispensary.

Tani and Junior go undercover at a gym to track down a deadly batch of steroids. Meanwhile, Danny and McGarrett work as bodyguards for Danny's ex-mother-in-law, a famous romance novelist with whom he has never got along.