Sam Hamm is an American screenwriter. Hamm wrote the original screenplay for Batman. After a writers strike, it underwent numerous revisions by Warren Skaaren, Charles McKeown and Jonathan Gems. While on strike, he was invited by Denny O'Neil to write for Detective Comics and the result was Batman: Blind Justice, which introduced Bruce Wayne's mentor, Henri Ducard, who later appeared (in a different way than the original) in Batman Begins.
Hamm wrote an unused Batman II screenplay with a completely different story than what appeared in the final film. Burton disliked the story so much that he hired Daniel Waters to take the narrative in a completely different direction.
However, Hamm has been credited for writing the screen story of Batman Returns.