Cold Hands, Cold Heart - S3.E10

The Commissioner, twitching in the Batsignal, explodes into a pile of gears and wheels and microchips: He’s a Robot! Who is behind this robotic Commissioner? None other than the Commissioner’s supposedly loyal assistant, Dora Smithy. Sister to Nora. Sister-in-law to Mr. Freeze. The Robotic Replacement was designed to crack down on the costumed villains – like Mr. Freeze – whom Dora blames for her sister’s fate. In a final pitched battle in an old Mr. Freeze hideout, Dora falls into a vat of cryo-solution and is turned into a female version of Mr. Freeze. The very thing she hated.