The opening hasn't change very much in the show's run so there are many of the same elements that have existed since 1989. Bart Skateboarding, the chalkboard gag, the couch gag, Lisa playing in the school band, Homer at work, Marge & Maggie in the car among others.
How the West was won
She was never on the show. She did, however, appear in the opening credits.
If you're talking about season 7, he was gone from the credits in the very first episode without him.
He voiced Roger in the season 22 episode "Treehouse of Horror XXI".
There does not appear to be any study of historical writings regarding The Simpsons.
No.
Acting credits refer to the official recognition given to performers for their roles in film, television, theater, or other performance mediums. These credits typically appear in the production's promotional materials, such as the opening or closing credits, and serve to acknowledge the contributions of actors to a project. They can enhance an actor's resume and are often used to showcase their experience and skills in the industry.
Das Bus
November 1996.
1987
They appeared on The Simpsons Movie.
Trilogy of Error.