|First Appearance||"Portrait of the Artist as a Young Milo"|
|Last Appearance||"The Finale"|
Mark Hamill first appears in "Portrait of the Artist as a Young Milo" when Pepper Ann suggests that Milo (who has artist's block) talk to someone whose work has inspired him in the past. Milo remembers that Mark Hamill has inspired him, and finds him at a book signing.
Unfortunately, the artist Milo was thinking of turns out to be Dorothy Hamill, the ice skater...not Mark.
He appears once more in "The Finale" and has apparently become President of the United States.