When Batman and Robin realized that the suspect is a female, Robin said it was Catwoman, but Batman said it wasn't her she's down in the river which happened in Scat, Darn Catwoman.
When Batman tells Commissioner Gordon to be on the lookout for a female suspect, Gordon seems shocked at the thought of a criminal being a female although Robin had mentioned Catwoman only seconds earlier.
It seems odd that Commissioner Gordon would have O'Hara turn on the Bat Signal before he'd even tried the Bat Phone. He couldn't have known Batman wouldn't be near his phone before he called.
Robin (to Batman): Holy backfires! What have they done to Aunt Harri... (Robin notices a guy near them) What have they done to that Mrs. Cooper? (cuts to Zelda the Great's hideout as Zelda is present with Aunt Harriet in a straitjacket and hanging over a vat of boiling oil)
Narrator: Holy backfire's right. Aunt Harriet has just one hour!! What'll it be?? Splash or salvation?? Hold a hopeful breath for Aunt Harriet until tomorrow. Same Bat-Time!! Same Bat-Channel!!
This was Anne Baxter's first appearance on the show but her only one as Zelda. She later would appear in the final season as Egghead's paramour Olga, Queen of the Cossacks.
Based on "Batman's Inescapable Doom-Trap!" from Detective Comics #346 by John Broome. Although the evil character Eivol Ekdal appeared in the story, Zelda didn't; instead the magician was a man named Carnado.