The characters change and grow so much from when they started out. What at first looks like boring and predictable relationships is actually an intentional build-up to a huge twist that threw me so off guard I swear my feels were broken for a full week. All of the characters are very well done. || The action is not too intense, but you may want to be cautious. Alien objects turn people into stone, super-powered individuals can turn people into ice. A central theme is that one of the main characters died and came back to life, and the after effects of the procedure used can have a morbid and foreboding air to it. The procedure is shown a few times briefly, as a machine working on the brain of the individual while they cry out in pain, begging the people operating it to let them die instead of trying to resurrect them further. One person who went through treatment with the gh325 drug went insane and gained super strength, using it to rip out some of the inner organs of a man who opposed him (it wasn't ridiculously graphic: his hand was shown as bloody and it showed a blood covered intestine. It was very brief.) Someone else who also went through this treatment showed indications of insanity, taking a woman and using a knife to carve alien symbols into her skin, killing her afterwards. Later, it shows a man cutting a woman open while she was awake and removing her inner organs, then a brief shot of himself getting onto the operating table and starting to cut himself open, implying he put her organs into himself. Strategically placed camera angles keep too much from being shown, but it could still very easily be disturbing for younger kids, especially since (SPOILERS) she turns out to be the mother of one of the main characters. The woman's body is disposed of. Two people are betrayed by a friend and are pushed out of an airplane and into the ocean, almost dying as a result of it. The expected martial arts fighting scenes, with no major injuries. One main character almost dies of a gun wound, and others are grazed infrequently. The agents normally refrain from using real guns and instead use guns that simply knock out their enemies. || There is a side-plot where two of the characters have a premarital sex-without-love relationship, and it is described as such. The typical implied "man getting out of bed with woman laying down next to him." There are no real consequences for this. A bit of kissing, some romantic tension. Later in season 2, a divorced couple decides to "give it another go" and begin it with a bit of passionate kissing before spending the night together. || The occasional "hell" or "damn", maybe a "bitch" or two, but that's as bad as it gets. ||| I do remember that when I first started watching the show, I was like "this isn't the best, but I don't have anything else to watch, so I might as well continue." Boy, am I glad I did. The send off had a bit of a juvenile feel to it, but I swear, it goes from an average "meh" show to being up there (in my opinion) with Doctor Who and Once Upon A Time in terms of quality level. Despite the extensive violence, I honestly think that (especially with the new plot twist at the end of season 2 that creates a new Marvel tie-in) it is an amazing watch that will soon be very important in the Marvel universe.