In which "The Simpsons" episode written by Jack Barth and directed by Mark Kirkland does this fictional character (who usually does low-level work) voiced by Phil Hartman appear as the main character?
Troy McClure:  McClure is usually shown doing low-level work, such as hosting infomercials and educational films. Troy McClure:  He appears as the main character in "A Fish Called Selma", in which he marries Selma Bouvier to aid his failing career and quash rumors about his personal life. A Fish Called Selma:  Freelance writer Jack Barth wrote the episode, and Mark Kirkland directed it.
i don't know