A couple can be seen making out (no nudity).

A man watches a spicy sex scene on tv (no nudity).

A man nearly rapes his wife in a aggressive way, he stops because of his wive's screaming.

A man kills a pup by choking it to death (offscreen), the pup can be heard wheeping.

The only scene that could be considered as violent is when an alien gets bitten in it's neck by a dog during the finale, purple colored tissue can be seen with a bit of purple splatter.

A couple of men try to shoot the aliens during the finale, it doesn't affect them at all.

A few men are drinking beer at a bar.

A woman gets drunk at a party.

The real appearance of the alien looks like he's made of purple colored jellow, nothing frightening but small children could consider it as frightening.

A few people get sucked into a large purple colored blob, they get replaced by aliens who take their appearances.

A few aliens can be seen melting during the finale, this effect isn't too convincing.

A woman has nightmares about being abducted by aliens.