During the case they find out the principal of a college is a serial assaulter, with a lot of talk about his crimes and its effects on his victims. Nothing is shown, but really heavy still.
An elderly woman with dementia thinks a teenage boy is her dead husband and makes lewd comments to him about her sex life. Thankfully doesn't go further than that
A man is found out to have a lot of extramarital encounters, several of them without consent. The only thing shown is him trying to grab a woman's shoulder before being brushed off
The killer kidnaps various people, some of them to try and kill and others for them to leave messages in a cat-and-mouse game between him and the main characters.
About 6:30, at the dinner party. One woman says, "I don't feel very well, and then everyone gets sick. Not sure about visual, but definitely audio. It lasts about a minute. There's more gagging when they go into the outbuilding, and one guy runs out & bends over, but I didn't see anything.