Hawaii Five 0 — Episode 25: Waiho wale kahiko (Ancients Exposed)

You are watching the episode Waiho wale kahiko (Ancients Exposed) 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.