There are a few tense moments after the is stolen for revenge that something horrible happened. But the dog is returned alive and well. Unharmed and happy.
You don’t actually see it happen. There was a car accident, then it shows the character in a hospital bed, they pull back the blanket to reveal a partial leg amputation (so it’s covered in bandages, no blood)
A grandmother type steels a younger woman's dog. The grandmother type then implys she killed the dog. At that point the younger woman open hand slaps the older woman across the cheek one time.
It is revealed that a main character has a benign brain tumor that will need treatment. Once this is revealed it is brought up numerous times (and likely will be brought up the entire series)
It gets brought up in ep 1 or 2 and is just talked about. They show the fall in episode 4 (first is a brief clip, then one of him falling, then one falling and landing in the water)