What are the major differences between the Watchmen comic book and the HBO series adaptation?

The HBO series adaptation of Watchmen differs significantly from the comic book in terms of tone, character development, and narrative focus. While the series retains the core themes and story elements, it expands on certain characters and storylines, particularly those involving Dr. Manhattan and the black superheroes. It also incorporates a more modern and politically charged context, exploring issues of race, identity, and social justice in greater depth than the original comic.