Hawaii Five-0

Season 8, Episode 25

Episode Title: Waiho wale kahiko (Ancients Exposed)

Air Date: 2018-05-18

Overview:

McGarrett and Five-0 discover a Russian spy ring hiding in plain site on Oahu when a Russian nuclear attack submarine appears on the coast of Waikiki. Also, Tani is conflicted by her unnerving discovery at Adam's house.