Jack Reacher, a veteran military police investigator, has just recently entered civilian life. Reacher is a drifter, carrying no phone and the barest of essentials as he travels the country and explores the nation he once served.
Episode 7: At the Hubble house, there is a fight scene and near the end of it, a character is being held underwater by someone with a crowbar and is struggling.
Episode 8: A character is fighting another and one of them is being held under gas?
A main character explains the reason they killed some people was because they were abusing children. There are cuts eyes that insinuate. Nothing is explicitly shown.
It is not shown, but it is discussed a couple of times how one character (not actually seen in the show since he is deceased by this time) apparently committed suicide by hanging himself.
S1 episode 1: during a fight in the shower block, there is a graphic visual of a leg/ankle being forcibly broken. Edit: this becomes a recurring theme throughout the series! Reacher never leaves a fight without snapping an opponent's bones.
S1 episode 7: a single line reference to an unseen character having died of cancer some years ago.
S1 episode 8: although not said outright, it is implied that an on-screen character is dying of cancer.