Some people insist you shouldn't mess with a classic, but if a TV show has a compelling character or story line, a spinoff can lure loyal fans from the original and even attract new ones. To see which offshoots have done best, 24/7 Wall St. looked at the top-rated shows on IMDb that had at least 1,000 user ratings. To qualify, a show had to have been "connected to its original series through shared characters or a shared universe that is unique to the original." Among the site's findings: that spinoffs of children's shows do especially well. Here, the 10 most highly rated spinoffs, with the shows they were birthed from in parentheses:
10. The Bugs Bunny Show (Loony Tunes)
9. Black Adder the Third (The Black Adder)
8. Justice League (Batman: The Animated Series)
7. The Legend of Korra (Avatar: The Last Airbender)
6. Star Trek: The Next Generation (Star Trek: The Original Series)
Read on for the top five.