A woman's nipples and some cleavage can be seen through a night gown in a few scenes.

This being a murder mystery, we see a few people killed -- some shot, some slashed at their neck. No blood or gore is shown, simply people falling down dead.

A character smokes in one scene.

This is a murder thriller, and the plot involves stoppling a ruthless serial killer. We see several people die, or threatened with death, as the story progresses. The villain intentionally wears a frightening disguise, and kills his victims with metallic claws on his hands.

Unrelated to the killer nicknamed, "The Bat," an actual bat attacks and bites one of the people in the house.