A shirtless man lies over a clothed woman in bed. They kiss. Nothing else happens. We do see her standing near the bed talking wearing an oversized shirt and panties, although we see no nudity on her.

There are 2 scenes with brief nudity. One of a woman escaping an attack and another remembrance scene with a nude woman floating in air. Alien creature has an orifice that is rather like female genitalia, very strange allusion.

A man is stabbed to death.

Several people commit suicide under the control of a mysterious force though nothing is very graphic.

A man begins to struggle and collapse, possibly because of a heart attack, and then dies after the insinuation it's being caused by something else.

Several intense scenes of people killing large groups of people without much detail.

A man collapses in an industrial elevator and is presumably decapitated offscreen.

A man slits the throat of another man on a pool table before stabbing another to death and finally cutting his own neck.

Movie starts out with people being shotdown on the street by a sniper, scary for a young person

No strong language, though there is some mild.

It was filmed in 1976 so of course there is smoking. Not much drinking though

Religious concepts confused with alien abductions would be rather confusing for younger children.