Number 2

"Why did you think a big balloon would stop people?"

- Number 2

Number 2 or The Mysterious Leader is the leader of The Island.

History
He keeps people who have information that a powerful organization does not want shared with the world as prisoners. One of his prisoners is Homer. He hired a German Homer look-a-like to replace Homer.

Trivia

 * It is revealed in the book The Simpsons Beyond Forever that he is called Number 2.