1 March 2011,
Here's the syno[sis for Hawaii Five-0, Season 1 Episode 19: "Ne Me'e Laua Na Paio"

Larisa Oleynik Guest Stars as a CIA Agent Who May Have Information About McGarrett's Parents' Murders

Five-0 must unravel the mystery of why a mild-mannered sci-fi fan wearing a cape was given truth serum before being tossed out of a 21st-story window. Meanwhile, McGarrett gets an expected visit from a CIA agent who shares his personal interest in tracking down the Yakuza who had his parents killed, on Hawaii Five-0, Monday, March 21.

Labels: CBS, Hawaii Five-O, Larisa Oleynik, Season 1, Spoiler, Synopsis