The show has some episodes that may scare younger audiences, one episode has the crew entering a Mars base, the base is littered with dead bodies and dim lighting. It builds to the reveal of killer robot that attempts to the kill the protagonists.
The Mysterons may frighten small children.
Killer robots, shape shifters and armies of aliens/martians known as the Mysterons who kill humans and replicate them.
Lots of exciting action scenes.
The show has themes of politics, nuclear armageddon, conspiracies, interception and alien invasion.
One episode has a town taken over by the Mysterons and another episode has a creepy old woman replicated by the Mysterons. May scare small children.
(Deleted. Personal opinions about ratings are not appropriate for the Parents Guide.)
Enemies can be scary and intimidating.