Plot hole: In "The Conners" premier, Dan solely blames neighbor Marcy Bellinger for Roseanne's death after finding a bottle of opiates with Marcy's name on it. He only relents after Darlene shows him additional opiates that other people gave Roseanne and were hidden around the house. However, in the Season 10 reboot of "Roseanne", Dan had previously discovered and confronted Roseanne about her multiple opiate stashes, including one bottle with Marcy's name on it which he read aloud.
The Conners (2018)
1 plot hole in season 1
Starring: John Goodman, Laurie Metcalf, Sara Gilbert, Alicia Goranson
Genres: Comedy
Character mistake: Dan makes a reference to the movie "Planes, Trains, and Automobiles" (the movie he's planning on the family to watch). He starts a sentence saying "by the time John Candy says 'those aren't pillows'." John Candy did not say that line in the movie - Steve Martin did.
The Dog Days of Christmas - S5-E10
Trivia: Jane Curtin, who plays Louise's mom, is only six years older than Katy Sagal (Louise).