Violence: Towards beginning of movie, character is shot by terrorists by gun (no blood, ends up being fine and unharmed). Some peril, as character may not exist anymore/time travel paradoxes. Some physical fights, none resulting in serious injury.
Language: Upper level PG, low PG-13. Some usage of mild to moderate language including d*mn, h*ll, *ss, cr*p, sh*t.
Sex: Very high for PG, should be PG-13. Various allusions and suggestions of sex, especially making it seem normal among teens(however none is shown and allusions are mostly vague). Boy seen briefly in underwear. Girl begins to undress in car, wanting to have sex (guy doesn't want to, since its his mother in the past, girl still remains clothed). However, the worst materiel is when the girl is almost raped by another guy (however it's stopped shortly after and doesn't go beyond forced kissing).