- Everything involving Charles Hoyt. In particular, the way he preys on and tortures his victims, most notably Jane, is uncomfortably and disturbingly reminiscent of rape. He also threatens to rape Maura at one point. The guy is just so unsettling and unpredictable in his behavior, it's scary.
- The case in "Tears Of A Clown" involves a clown kidnapping children. Sound familiar?
- "In Over Your Head" has an absolutely brutal opening in which a teenage girl stumbles upon a drug deal. The scene then cuts to her being interrogated by being repeatedly dunked in a water tank until she drowns. And unlike a lot of opening murders, we get to hear her cries of distress in her last moments.
- "Crazy For You": Bianchi has Jane trussed up in a bed, dressed in a very un-Jane ruffled skirt and pink high heels. And he notes that "You missed your Brazilian, honey." Jane's horrified look when she realizes that this creepy-as-hell stranger has undressed her...
- The killer revealed in "Melt My Heart to Stone" comes a little out of left field but it's a true horror when we realise that by saving their life Maura has become this killer's obsession. Had she not saved his life he would not want to make her his "greatest work of art."
Nightmare Fuel / Rizzoli & Isles