In season two, after a wife admits to her husband that she had an abortion, they break into a fight and he drags her into the ocean and attempts to drown her while hitting her head against a rock. Prior to this point they are portrayed as a couple that enjoys rough sex.
Major Season 1 Spoilers: Danny is mentioned to having been hit by his father one or twice. Joe tries to comfort him, which leads to Joe “falling in love” with him and having him meet him in the night. Joe kills him when Danny says he’s uncomfortable and he’s going to tell his parents about Joe’s behavior. Though Joe claims he never touched him, it’s heavily implied if Joe didn’t kill him that he would have.
claire and lee are at the beach and he puts his hand(s) in/on her hair before grabbing it and using it to pull her into the ocean because she had an abortion, pretty easy to tell when it’s coming as you can see when he grips her hair more tightly ^^
the main plot of season 1/2 is around a murdered boy, his cause of death was strangulation and at the end of season 1 we see the murder, including the boy's face as he is strangled to death
S1E4: as Alec gets back into the hotel after coming back from Ellie’s house, he comes back and after taking some pills, callapses on the floor (there’s a bit of blood here), he then goes to hospital. Waking up the next morning and discharging himself to continue on the case (the hotel owner found him and called the ambulance pretending he was her husband) this is also (spoilers) when he finds out the family went to the press Time codes: First collapses 32:10 Ambulance montage for about a minute Wakes up in hospital 33 minutes in End of hospital stuff 34:07 Hope this helps
In the last minutes of the 6th episode of season 3 a character drives a boot on the open sea and goes into the water with the intention to end their life. They survive
Not necessarily these words but a character says that they would k*** themselves if they had the courage to do so.
SPOILER
The conversation takes place when Mark Latimer and Joe Miller meet and sit down together. Joe and Mark both talk about their wishes to die. It lasts for quite some time and afterwards Mark calls his daughter to tell her he loves her and unsuccessfully tries to end his life by going into open water
Season 1 Episode 4 ends with the detectives finding the corpse of one of the townspeople who has committed suicide. The act of the suicide itself is not shown, but it is a major plot point in episode 4 how the person is driven to it.
By the end of season two, one character is confirmed to have had an abortion. Her husband then attacks her for not telling him. The abortion itself is not depicted though.