16 December 2010,
Here's the synopsis for the Hawaii Five-0 return, Season 1 Episode 13: "Ke Kinohi" which airs Monday, Jan 3rd.

When McGarrett’s sister is kidnapped and his father’s Champ box stolen from his apartment, Steve and Five-0 discover new clues in his mother’s murder, including possible ties to the Japanese Yakuza (mafia).

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