There is a brief struggle between a child, a robot and an attacking dog, but the scene does not appear abusive to the dog. However, there is a reference in the dialogue to the use of an electric shock collar for the dog (and a suggestion to increase its power). The shock collar is depicted as being electrically activated during the attack scene, although this is clearly a special effect and not an actual shock collar used during filming.
In the theatrical version, a liquid representing blood is used fairly liberally in an elevator shot. The Unrated version has more gore than the theatrical version.
There is an indirect reference to suicide: the robot sets up one of its kills to look like a suicide, and explains this to the victim as it does so, framing its words as if the intended interpretation of events is factual ("you did" rather than "they'll think you did").
A boy's ear is depicted as being pulled off, and a woman's face is depicted as being sprayed by a chemical. These are both low-gore scenes in the theatrical version but more gory in the unrated version.
Sad for AI optimists: the robot is destroyed instead of its AI being fixed, and there is very little denouement. However, it is suggested that the girl's life is on its way to improving, and perhaps the robot's AI is not entirely gone.
The robot causes some domestic lights to strobe during its final fight. The frequency is not constant however, and appears to have been designed in a way that should avoid triggering photosensitive epilepsy in viewers. Ambient studio lighting is present throughout the scene so it never goes completely dark.
There are two brief scenes where police officers are present, but nothing unduly propagandistic. In the first, a policeman laughs when he's not supposed to, and in the second the police turn up just too late for the action.
There is a brief gaslighting scene while the robot is setting up one of its victims to look like a suicide. The robot explains to the victim how they supposedly ended up dying by suicide.
The robot briefly holds its creator in position. The creator managers to escape from this, using a substance that was foreshadowed earlier in the film.
A man is hung in the air with the cable tied around his neck, but he is rescued. A woman's face is held by a robot in a manner that restricts her breathing for a short time; she does not die.
Both parents die in a car crash in the first scene. The scene stops just short of the actual impact. The death of the parents then becomes a major subject for the rest of the film.
There is a brief depiction of an electric shock collar being used on a dog. The presence of the electric shock collar is not the main focus of that scene.
A man is trapped in an elevator with a murderous robot, but the reason for his being trapped is simply that the robot is standing between himself and the entrance; the scene's emphasis is not on the small space.
There is a possible brief reference as the robot struggles to come to terms with the existence of death, but there isn't a debate. It is implied that if there had been more discussion the robot might not have become murderous.
It is possible to interpret the ending as the robot sacrificing itself for the child's emotional stability, if we imagine that it could have got out of being destroyed but chose not to use all its options. However, its AI is implied to have probably survived. No human character sacrifices themself.
The fourth wall is not broken in the film. However, a lot of the marketing material surrounding the film involved the main character speaking directly to the audience. This included a title card that unexpectedly told the audience to pay attention to the film.
We see a child fall in front of a car and the car approaches the camera at speed. We do not see the actual impact, but subsequent dialogue makes reference to the death.