Violent sci-fi series raises discussion points for teens.
Campy classic still entertains but shows age in stereotypes.
Sci-fi drama explores the dark side of humans in captivity.
Teen wizard shines in entertaining British sci-fi.
Smart sci-fi with its own video game, ethical messages.
Time travel sci-fi with bloodless violence, tough heroine.
Teenage Ben's comical adventures are fun but violent.
Smart, thought-provoking sci-fi series is great for teens.
Post-apocalyptic adventure balances violence, family themes.
Tom Hanks-backed web series explores a violent dystopia.
Smart fantasy series mixes strong messages with violence.
Powerful anime explores mature themes with some gore.
Girl-centered sci-fi series is like a tween-sized Lost.
Sexual violence and fantasy are central to dark sci-fi.
Big-budget supernatural thriller with family at its heart.
Anime-style adaptation with strong hero, military setting.
Some violence plus positive messages in sci-fi crime drama.
Intense sci-fi action series is violent but deep.
Grim antiheroes make addicting TV but terrible role models.
Post-apocalyptic sci-fi drama depicts a violent future.
X-Files meets Twin Peaks in unoriginal but fun show.
Darker and still violent, this Ben 10 not for the sensitive.
Slow-moving Battlestar spin-off best for big fans.