The Fly (1986): parents' guide

Grotesque rather than frequent: a baboon is turned inside out in a failed test, an arm is snapped in an arm-wrestling match, corrosive vomit melts a man's hand and foot, and a mutated man is shot with a shotgun.

Infrequent, per the BBFC: an f-word, plus s-words, bullshit, chickenshit, a--hole, damn and a crude word for penis.

The leads have sex in a brief scene that shows the man's bare buttocks as he thrusts, and a woman's breast is glimpsed afterward. The scientist later brings home a woman from a bar, steps naked from his pod, and an ex-boyfriend sexually harasses the heroine.

Adults drink and smoke cigarettes. The scientist gets drunk and arm-wrestles a stranger in a dive bar. No drug use.

Disturbing body horror that builds steadily: oozing sores, teeth and fingernails falling out, a man crawling on walls, and a graphic nightmare of giving birth to a maggot. The final transformation and the tragic ending are deeply unsettling.