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.

A Dame to Kill For is a comic book limited series written and drawn by Frank Miller and first published by Dark Horse Comics in 1993. It is the second story in Miller's Sin City series, and the first to be published in miniseries format. It has since been reprinted in graphic novel format in four separate editions.