Parents Guide for
Back to the Future (1985) More at IMDbPro »

Some moments of a character's mother being attracted to her own future son (without knowing he's her son). She removes his pants while he's unconscious after an accident and openly comes on to him.

A character is sexually assaulted in a car (a guy reaches under her skirt while she cries for him to stop as he gets on her). He is stopped by another guy.

Violence & Gore: 3

Some fist-fight scenes. An unarmed character is shot multiple times, no blood.

For a PG movie, the profanity is surprisingly high:

Jesus' name and God's are abused a good number of times.

4 S-words (2 with the prefix Holy, one used as something out of the ordinary, the other actually used to describe manure). There are also a bunch of hells and damns and at least one "son of a b***h" and "bastard".

One of the characters is seen drunk.

Also, Lea Thompson's character (at age 17) drinks alcohol and smokes a cigarette, but she is stopped on both occasions. The boy who stops her takes a sip of the alcohol but then spits it out.

The members of the band playing at the dance are seen smoking outside of the high school and it's implied they're smoking "reefers".

Characters are in mild to moderate peril throughout. The suspense in the climax of the film is intense, and Doc is in peril several times.

Terrorists with automatic weapons drive past shooting at Doc and Marty and then crash into a small structure. Doc is shot many times, no blood. Marty is uninjured.