Sometimes a TV show gets BETTER when someone leaves it. Here's a list of nine times that supposedly happened:
1. Lisa Bonet, "A Different World". The show was originally a spin-off of "The Cosby Show" featuring Lisa's character going off to college. But then Lenny Kravitz knocked her up in real life.
So she left, and eventually returned to "Cosby" after having the baby.
2. Paul Schneider, "Parks and Recreation". When he left after Season Two, the show brought on both Rob Lowe and Adam Scott.
3. Craig Kilborn, "The Daily Show". It's hard to believe there was ever a host other than Jon Stewart, but Kilborn had it from 1996 to 1999.
4. Shelley Long, "Cheers". It was Shelley's choice to leave the show, and it turned out to be a bad choice for HER. But replacing her with Kirstie Alley and ending the Sam-and-Diane romance angle probably saved the show creatively.
5. George Clooney, "ER". Clooney was the breakout star, but his departure in 1999 didn't kill the show. In fact, "ER" survived a million other cast shakeups before it ended, without ever really losing what made it great.
6. Mischa Barton, "The O.C." The show actually went downhill ratings-wise when Mischa left . . . but the fans who stayed generally agreed it got better.
7. Valerie Harper and Cloris Leachman, "The Mary Tyler Moore Show". They both left for their own spin-offs, but that allowed more room for two of the show's other female cast members, Betty White and Georgia Engel, to shine.
8. Denise Crosby, "Star Trek: The Next Generation". Her character was kind of a mixed bag, and not really a favorite among fans. When she was killed off, characters like Worf and Geordi got a lot more screen time.
9. Katherine Heigl, "Grey's Anatomy". By the time Heigl left the show, her character had gotten pretty annoying . . . sort of like the public's real-life perception of her. And no one was really sad to see her go.