Jerry Seinfeld refused to do a 10th season of his incredibly popular sitcom, turning down an offered $5 million per episode. He wanted the show to go out on a high note.
The Jeffersons: For two years, Marla Gibbs, who played Florence, kept her job at United Airlines in customer service while simultaneously filming for the show. Sometimes people would recognize her voice over the phone.
The Flintstones was the highest-earning network cartoon franchise for 30 years.
Television series featuring superheroes have grown in popularity over the past few decades, with over 70% of superhero t.v. shows made so far appearing after 1990.