PG

The Search for Spock is more concerned with the cerebral than the visceral, and as such, it plays nicely within its parental guidance rating.

The language remains on the cleaner side of dirty with the most common swear being an occasional "damn" or "hell." The worst of it comes when McCoy calls Spock a "green-blooded son of a b*tch" after learning that Spock implanted his spirit into McCoy's brain without his permission. Although his choice of words may be a bit blue, his anger's understandable. We don't appreciate people getting songs stuck in our heads, let alone entire souls.

Violence-wise the film has nothing on the R-rated science fiction of the 80s—or most anything else from 80s for that matter. Kirk and Kruge have an awkward fistfight that ends with Kirk knocking the Klingon into a lava pit, making it basically as violent as the last level in a Super Mario Bros game.

Another scene shows Kruge shooting one of his men with a phaser, disintegrating him atom by atom. That may sound hyper-violent, but the effect is accomplished with 80s special effects, so it comes off like death by Microsoft Paint.

Finally, we should discuss pon farr. This Vulcan phrase may sound like a kinky alien sex act, but only because it is a kinky alien sex act. Thing is, it's never explicitly explained.

Saavik describes it in only two lines of dialogue:

SAAVIK: It will be hardest on Spock. Soon he will feel the burning of his Vulcan blood.

and

SAAVIK: Pon farr. Vulcan males must endure it every seventh year of their adult life.

That's it.

What remains unspoken is that the Vulcan male must mate to cool his blood or die. Of course, viewers will only know this if they have seen the Original Series episode "Amok Time" or read about it in extra-narrative sources like the Star Trek wiki.

Later, Saavik mates with Spock to help him survive the ordeal—but even visually the act is more suggestive than explicit. Each rubs the other's Vulcan hand gesture, and no, that's not a euphemism. The entire act consists of them caressing each other's hands. It may be an alien mating ritual, but it has all the erotic overtones of a game of patty cake.

You still might want to have a Vulcan-and-the-bees answer at the ready for the more inquisitive Trekkies in training.