Episode 1: A man gets on top of a girl and leans over her, both of them still fully clothed. Nothing explicit. Even though there's nothing sexual implied, it may still be intense for some viewers.
Zack calls Eddie a necrophiliac because he finds corpses to be beautiful (though he does not sexually touch corpses).
Violence & Gore
Severe
Episode 1: A bird gets killed offscreen. A couple mnutes later, we see the bird dead, lying in a pool of its own blood.
One killer hangs his victims and then takes their eyes.
The whole series is mostly about torturing other people.
Profanity
Mild
There is swearing throughout the entire show, Zack is the one that swears the most though. Expect such swears as: Sh*t, B*stard, Damn, Hell, Piss, and B*tch
Alcohol, Drugs & Smoking
None
The main character's father is implied to be an alcoholic. He is extremely abusive because of it.
Frightening & Intense Scenes
Severe
Rachel is extremely suicidal. She at some points has mental breakdowns. She has an overall creepy personality.
Kathy is extremely sadistic, and will torture her victims.