WATCH VIDEO : Hawaii Five-0 Season 4 Episode 11 Pukana (Keepsake)
Episode Name: Pukana (Keepsake)
Air date: 12/20/2013
Summary:
Chin's life is put in danger when a murder investigation reveals that the person behind the crime may be a serial killer. Meanwhile, Danny and Grace find a mysterious puzzle box washed up on the shores of Oahu.