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.
Casts:
Alex O'Loughlin, Scott Caan, Ian Anthony Dale, Meaghan Rath, Beulah Koale, Dennis Chun, Kimee Balmilero, Chi McBride, Taylor Wily, Katrina Law