Parents need to know that Thor: Ragnarok is the third chapter in Marvel's solo-superhero series about the ancient god of thunder, Thor (Chris Hemsworth) -- and the first to be directed by cult favorite Taika Waititi (What We Do in the Shadows). It's much less serious and dark than the previous Thor installments (especially The Dark World); humor/tone-wise, it's a lot more like Guardians of the Galaxy and Ant-Man. Violence will probably be the main issue for most parents: Characters die (including tons of nameless bad guys), villain Hela can be very scary, and there's more slashing and stabbing than in other Marvel movies, though it's still mostly gore-free and non-graphic. You can also expect plenty of big, explosive comic book-style moments. Language includes 'ass' and 's--t,' as well as adolescent humor-style references to masturbation and orgies. One character drinks a lot, but it's not treated as a serious problem. There's a theme of facing major, traumatic change that will have ripples throughout future Marvel titles and may have an impact on younger viewers; characters also display positive traits including courage and perseverance.