A plane that mysteriously crashed into the Pacific in the '80s is found, but with a recently murdered scuba diver inside; McGarrett and Quinn zero in on who planted the bomb in his garage; McGarrett formally asks Quinn to join the team.

Cast: Alex O'Loughlin, Scott Caan, Ian Anthony Dale, Meaghan Rath, Beulah Koale, Katrina Law, Taylor Wily, Dennis Chun, Kimee Balmilero, Chi McBride, Cullen Douglas, Johnathan Gregory, Joshua Han, Asante Jones