Hawaii Five-O (1968)

S1E25 The Big Kahuna

Sam Kalakua, Kono's distant cousin, is being terrorized by a fabricated vision of a Hawaiian deity, conjured by his own nephew. The nephew's ulterior motive is to scare Sam into selling the family estate to a land developer. As the deception unfolds, the Five-0 team steps in to unravel the mystery and protect Sam from the sinister plot aimed at exploiting his property.