Best Investigation movies of 1976

Actors : Nigel Davenport, Ken Gampu, Bima Stagg, Peter Dyneley,
Directors : Christopher Rowley,

A white cop and a black reporter join forces to investigate apparent vigilante killings in the South African underworld.

Actors : Maki Tachibana, Megumi Hori, Keiko Kinugasa,
Directors : Takayuki Minagawa,

Female ninjas nudity and sword-wielding action directed by Takayuki Miyagawa is bawdy and thrilling. The female ninjas are sent undercover (sometimes under bed covers) to investigate the disappearance of a gold chest.

Actors : Nicky Fylan, Gary McKeehan, Susan Minas, Cec Linder,
Directors : Ed Hunt,

In this sci-fi thriller, authorities begin looking into a series of violent deaths. Their investigation leads them into the arcane worlds of UFOs and nuclear research.