The first six seasons of the show have a fair variety of editing errors, like unintentionally showing uncensored dead bodies. This may upset and shock some viewers. Season 1, Episode 6 (Killing Spree) is an example.
Some of the interrogation scenes can be very intense, disturbing, and upsetting to viewers.
The part where the detectives have to bear the news to injured and/or dead victims' friends and loved ones are usually extremely upsetting and difficult to watch.
Having to see the victims' loved ones grieve weeks and months after their death is very sad.
