Parents Guide for
Star Trek IV: The Voyage Home (1986) More at IMDbPro »

None.

One character falls from a great height and ends up unconscious and in critical condition, but is healed bloodlessly by scifi technology.

A punk on a bus is non-violently rendered unconscious. Played for laughs.

The heroes race in their ship to rescue some whales from whalers in open sea and appear too late as the whalers fire their harpoon at the animals. However, the harpoon suddenly strikes something hard in mid-air and falls harmlessly. The reason for that proves to be the heroes' ship, which was invisible at the time and arrived in time to block the shot.

7 uses of "damn," almost 20 uses of "hell," a few uses of "s**t," 1 use of "b**ch," and some other mild profanity.

One instance of a character giving "the finger."

Some social drinking of beer.

Offhand comment implying a character did a little too much "LSD" in the 1960s.

Slightly trippy time-travel scene may be somewhat unsettling for small children.

One scene of characters underwater, struggling for breath while escaping a sinking craft, may be intense for some.