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.

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

After a Navy SEAL is attacked while moonlighting at a security job for a successful marijuana dispensary, Sam personally vows to apprehend the suspect out of respect for the Navy SEAL brotherhood.