Common Sense Note
Parents need to know that violence drives the plot of this sci-fi drama, but it's surprisingly light on blood and gore. That said, characters use weapons of every sort -- from guns to explosives -- and death is a common occurrence. (The aliens themselves are pretty creepy, too.) You'll also hear low-level curse words like "hell" and "damn," and see light sexual content (like kissing).
Sex isn't the focus in a survival situation, but there's some mild innuendo/flirting/interaction between select characters. Some kissing.
Violent acts aren't excessively shocking or gory, but there are frequent gun battles, laser fights, and bombings with bouts of blood and death. Most characters have experienced life-altering moments of violence. Children taken prisoner by the aliens are outfitted with controlling devices that look painful and invasive.
Infrequent use of "damn," "hell," etc.
The show drives home positive messages about building community, working together, and protecting human life whenever possible. Most families are no longer intact, but the concept of family is still very important.
Drugs / Tobacco /