Sex Reference is mild and it must be infrequent.

Multiple on and offscreen character deaths.

Many scenes of arena fighting is shown. Many of the human fighters are shown with scrapes & blood on them as their fighting monster aliens that are way bigger than them.

A main character looses his arm. Not gory.

Many spaceships blow up, killing many people off screen.

A sick woman dies in bed onscreen. We see her lifeless hand drop.

There are intense instances of science fiction action in the series, but it usually involves the protagonists fighting against robots or beings they are unable or not required to injure. On occasion living characters face each other in combat, but typically it ends with the hero restraining or being restrained by their opponent or the character being stunned. Little to no blood.

Some toilet rudeness

Coran makes a alien drink at a party and gives it to human characters. It's never specified what's in it, but it's hinted that's there's alcohol in it. The human characters spit it out because they don't like it.

Characters walk into alien bars and they are seen drinking alien alcoholic drinks.

There is a flashback where a women is very sick and dying, and she's loosing her sanity. They show her lying in bed, gripping the sheets and only saying two words. She is skinny and her bones can be seen through her skin.

Keith yells at Pidge saying that her family is not as important as saving thousands of people. It can be upsetting for younger viewers to see two main characters (who are friends) yelling at each other.

Many emotionally intense scenes throughout.

Several suspenseful scenes throughout.

The Galra are depicted as a much scarier and more serious threat than their counterparts in previous incarnations of the franchise, and various scenes with them might be scary for young children. At least one character suffers in various scenes from post-traumatic stress disorder; various action sequences are fast paced and may be frightening to younger children as well. Several characters die or are implied to be dead.