Hawaii Five-0 (2010)

S1E19 Ne Me‘e Laua Na Paio (Heroes and Villains)

The Five-0 team investigates a murder at a sci-fi convention after a fan is discovered dead from a fall out of a tall building. Meanwhile, a CIA operative arrives in Honolulu with a keen interest in the Yakuza, the group responsible for the deaths of McGarrett's parents, and seeks a meeting with Steve.