Parents Guide for
Twisted Nerve (1968) More at IMDbPro »

Martin's buttocks are seen twice in the film. The first time is brief, though the second time is extended and the camera more or less lingers on his naked body.

Susan also undresses in one scene, but it is from a distance, and behind a tree, so although it is clear that she is naked, no actual nudity is seen.

Martin kills his father with a pair of scissors, but there is no blood. The only blood seen is a small amount shown on his corpse, later.

Martin accidentally cuts his hand with a saw; there is a close up of the moderately bloody wound.

Joan is killed by a hatchet to the head, but off screen. However, she is shown later with blood and a wound on her forehead.

Social alcohol drinking is shown, as is casual cigarette smoking.

A reference is made to a character being "stoned", but there is no drug use on screen.