Guest Stars Chris Mulkey as William Pettifer Richard Herd as Milton Cooper Co Starring Ma'a Tanuvasa as Guard Mariano Farrar as Clarence Whitmour Daisy Kim Murakami as Yuki Uncredited Meaghan Rath as Alexa Alana Scott Caan as Milton Cooper - 1941 Ian Anthony Dale as Earl Blackstone Alex O'Loughlin as Steven McGarrett Sr - 1941 Chi McBride as Capt. Charles Sumner Beulah Koale as Evan Kekoa Taylor Wily as "Biggie" Tupa Jorge Garcia as Officer Mike Flanagan Dennis Chun as Sgt. Naskiuchi