Kara Zor-El, Superman's cousin and the most enduring of his many would-be successors. Created by Otto Binder and Al Plastino in 1959, Supergirl has been a Silver Age icon, a casualty of Crisis on Infinite Earths, and a hard-fought fan favourite across decades of reboots. This codex covers Kara in full: origin, continuity history, every screen and animated portrayal from Helen Slater through Milly Alcock, costume evolution, and the fan-film tradition no other DC heroine can match.