YMMV / Star Trek S3 E23 "All Our Yesterdays"

• Hilarious in Hindsight: The library is using silvery hand-sized discs as data storage devices. Very sci-fi, back in The '60s! And now consider that today you can buy TOS (and thus this very episode!) on Blu-Ray and DVD...
• Theiss Titillation Theory: Zarabeth is wearing some rather scanty animal skins under her fur. But Will was careful to cover that bellybutton!
• Visual Effects of Awesome: The supernova at the end of the episode, with the planet being wiped out by the shockwave.

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