Extreme gory violence. There isn't any dialogue though, so no swearing, and the only female is a dinosaur, so nothing sexual either.

The show is excellent. Each of the elements that could become tiring manage not to overstay their welcome: the protagonists not getting along and creating their own problems, the emphasis on non-verbal communication, long slow establishing shots (something I DID get tired of in Samurai Jack, but it feels refined and better paced here).

Some refreshing things: both main characters lean into their strengths regularly: the caveman is obscenely strong, very intelligent, and never gives up in face of pain or fear; the dinosaur is bigger, stronger, faster, but can't climb, can't solve complex problems, and slowly begrudgingly accepts their partnership as being hierarchal since the caveman has more pronounced leadership qualities.

It avoids easy and expected narrative crutches like having the (non-human, non-male) dinosaur be superior (morally if not actually). And instead their friendship becomes incredibly strong and balanced over time.

It also manages room for once-off episodes with extremely awesome premises without it dominating the overall narrative. I won't say more, because going in cold is the best way for these excellent surprises to deliver themselves.