Hawaii Five-0 (2010) season 8 episode 5
Episode title: Kamaʻomaʻo, ka ‘aina huli hana (The Land of Activities)
At Halloween, Five-0 must investigate a string of murders that mirror stories from well-known Hawaiian folklore. Also, Grover is called to visit a man hours away from execution who may hold the key to a case that has plagued Grover for years.
