First Silver Age appearance of Catwoman (Selina Kyle)
Part 1: "The Catwoman's Black Magic!" – (8-page story) – When the Penguin escapes from prison, Lois tries to track him down but she is kidnapped by Catwoman instead, who hypnotizes her into acting as the villainess's double.
Part 2: "The Catwoman Gets the Bird!" – (8-page story) – The Penguin confronts Lois, thinking she's Catwoman, but Superman, Batman, and Robin show up to take the Penguin back to prison. Later, Clark Kent discovers Lois is now Catwoman's double and she traps him in a pit full of lions who tear off his clothes, revealing the Superman costume underneath.
Part 3: "Superman's Cat-astrophe!" – (7 2/3-page story) – Catwoman takes Lois's place and tricks Superman into taking her to her lair, where she uses Circe's magic wand to turn him into a cat. Meanwhile, Lois, now free of Catwoman's hypnosis (and having forgotten the revelation of Superman's identity), follows them and confronts Catwoman, demanding that she change Superman back. ... Story continues in next issue.