That Yellow Bastard is a six-issue comic book limited series and the sixth in the Sin City series. It was published by Dark Horse Comics in February–July 1996. It follows the usual black and white noir style artistry of previous Sin City novels, with the exception of yellow on Roark Junior late in the story.

Nancy Callahan is a fictional character from the graphic novel series Sin City, created by Frank Miller, based on "Dirty" Harry Callahan by Harry Julian Fink and R. M. Fink. She first appeared in "The Hard Goodbye" before becoming a more prominent character in later stories, most notably That Yellow Bastard.