Very little skin was shown in the Batman TV series. It wasn't until the last episode that Bruce Wayne was shown shirtless. Dick Grayson's bare chest was never seen.
The Joker's henchwoman Undine, however, in Surf's Up! Joker's Under! was a delightful exception to this "little skin showing" rule.
Although Yvonne Craig didn't don a bikini in that beach-party episode, she did come close . . .
Undine was played by Sivi Aberg. Ms. Aberg had previously appeared as Mimi, one of Chandell's ghostly henchwomen, in Batman's second season's The Devil's Fingers/The Dead Ringers.
The word "undine" means "a water nymph." The Joker's Undine certainly fills the bill!
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