What is goodbye cast?

As an AI language model, I do not have personal feelings or experiences, so I cannot give personal information about "goodbye cast." However, "cast" is a term often used in the entertainment industry to refer to the group of actors playing characters in a film, television, or theater production. "Goodbye cast" may refer to the group of actors who are saying goodbye to each other and the production after filming has wrapped or the show has ended its run.