
Smart, thought-provoking sci-fi series is great for teens.
Post-apocalyptic adventure balances violence, family themes.
New take on familiar kids' show has lots of noise, action.
No surprises in 16th battle-heavy installment.
Violence remains, but this one has substance, too.
"Magic beyond belief"? More like unbelievably bad.
Heroes battle bad guys in campy sci-fi series.
Power Rangers post-Morphin.