Getting lost in space has never been so much fun.
Parents need to know that some of the main characters in this series die, though they're generally resurrected through a variety of advanced technological devices, including time travel. This can make life and death seem somewhat fluid, rather than a permanent condition, which might seem confusing to some young viewers -- though older children will probably understand that these twists are just one of many common plot devices in the sci-fi realm. Overall, as with most of the Star Trek series, there's not too much content to worry about.