It's a shame when an actor ruins a perfectly good TV show.
But that's exactly what happened to these 13 shows.
Scroll down to find out which shows and actors we're talking about here.
Bill Cosby - The Cosby Show
This comedy series had a lot of fans because it focused on wholesome family values. However, the entire legacy of the series was tarnished when a lot of women came forward to accuse the comedian of using fame to sexually assault them.
Rosanne Barr - Roseanne
Barr went on a Twitter tirade against former Obama aide, Valerie Jarrett and hurled a racist insult. In response, ABC canceled her show. It later returned as a spinoff -- without Barr.
Lori Loughlin - Fuller House
Fuller House was already announced as ending before Loughlin's part in the college admissions scandal came to light. But word on the street is that Loughlin has not been asked back for the final season. It will be weird ending the show without Aunt Becky.
Chevy Chase - Community
Chevy went to war with Community creator Dan Harmon on the set of this NBC/Yahoo series ... until he was fired for his bad behavior. At one point, Chase left a voicemail o Harmon's phone complaining about his lack of talent.
Stephen Collins - 7th Heaven
Collins appeared on all 11 seasons of this WB/CW drama. But the family drama's legacy was rocked in 2014 when a tape leaked of him admitting to sexual abuse of an underage girl. Despite admitting in an interview that he had inappropriate sexual conduct with three girls, the police never found anything conclusive.
Charlie Sheen - Two and a Half Men
Sheen had a very public falling out with Chuck Lorre, the creator of The Big Bang Theory. This coincided with his 2010 meltdown. Sheen was let go and Ashton Kutcher played a new character. The show was never the same.
Thomas Hotch - Criminal Minds
Thomas Gibson was fired from the CBS procedural in 2016 for kicking a co-executive producer. There wasn't much in the way of an exit plot for the character, leading to a public outcry from fans.
Kirk Cameron - Growing Pains
Kirk called himself an atheist when the ABC comedy series kicked off, but he later identified as Christian. As a result, he made production on the comedy difficult due to his beliefs. He demanded storylines to be changed and dialogue to be cut. It was pretty bad, but he followed that up by getting his co-star Julie McCullough fired for posing for Playboy. Chelsea Noble, who was in a relationship with Cameron, replaced McCullough.
Kevin Spacey - House of Cards
Spacey's career imploded when Star Trek: Discovery star Anthony Rapp alleged that the actor tried to have sex with him at a party -- while he was underage. What followed was several men coming forward with their own allegations against the star. He was fired from House of Cards, resulting in an uneven final season that had a terrible conclusion.
Tori Spelling - Beverly Hills, 90210
Spelling wasn't fired. She was the one who got her co-star Shannen Doherty fired from the series. Doherty's character's conclusion was rushed and felt forced, and we have Spelling to thank for that.
Taylor Momsen - Gossip Girl
Little J was a pivotal character on the series, but Momsen's erratic behavior got her fired during the fourth season. She did return for a cameo in the series finale, but still, the loss of the character was felt.
Kevin James - Kevin Can Wait
James stirred up controversy when he ousted Erinn Hayes as his on-screen wife on this terrible CBS comedy series. Ratings crashed and the show was canceled the next season. Karma at its finest.
Finn Jones - Iron Fist
Iron Fist would have been a decent show without Finn Jones. He was miscast in the role of Danny Rand, and the show never really took off as a result.