Star-spangled bikini?
According to this YouTube vid, a star-spangled bikini was created for Lynda Carter to wear whenever Wonder Woman had to go swimming during an episode.
https://m.youtube.com/shorts/pj3xec8v1LI
But while filming, the top kept slipping off Carter during action scenes revealing her breasts to the production crew.
That’s why they ended up going with the full body outfit seen in the episodes instead.
Wow. If true, I’d love to see outtakes of those wardrobe malfunctions or at least production photos of the costume. 😳