Skullduggery

Skullduggery is a 1970 American adventure film directed by Gordon Douglas and starring Burt Reynolds as Douglas Temple. The movie follows an expedition into Papua New Guinea where they encounter a tribe of ape-like people known as the Tropis, who are being used as slaves. A murder trial centers on whether the Tropis are human or animal, with Dr. Sybil Greame (Susan Clark) playing a key role in questioning their status.