History Trivia / StarTrekS2E10JourneyToBabel

-->It went into the Vulcan relationships between families. I think that's a story that's universal and timeless – that communication between parents and children. And that to me was the big story. The rest of it was an adventure, it was a spy story, it was a mystery, it was an action story – but all in all it was really about the parents and the child... There had still been a vast lack of communication between them and they needed to find each other as parent and child.

-->I don't do comic strips, and ''Star Trek'' is six or seven comic strips rolled into one.

* UnderAgeCasting: Mark Lenard was only seven years older than Creator/LeonardNimoy, despite playing his father. The makeup people put grey in his hair to make him look older. In this case it also works because Vulcans live much longer and age more slowly than humans; in "The Deadly Years" while Spock is no less affected than Kirk, [=McCoy=] and the others, his aging is not nearly as pronounced.

** Many of the costumes worn by extras in the hallway and reception room scenes were recycled from several first season episodes, including the outfits worn by Galactic High Commissioner Ferris in "The Galileo Seven" and by Lazarus in "[[{{Recap/StarTrekS1E27TheAlternativeFactor}} The Alternative Factor]]". A female extra (Jeannie Malone) can be seen wearing a faux fur dress worn by Lenore Karidian in "[[{{Recap/StarTrekS1E13TheConscienceOfTheKing}} The Conscience of the King]]", complete with other recycled costume pieces. Another female alien is wearing Areel Shaw's civilian dress from "[[https://tvtropes.org/pmwiki/pmwiki.php/Recap/StarTrekS1E20CourtMartial Court Martial]]", and a third one is wearing a costume left over from "[[{{Recap/StarTrekS2E14WolfInTheFold}} Wolf in the Fold]]". Scott's dress uniform was also reused on an extra playing a Starfleet delegate.

** Many of the costumes worn by extras in the hallway and reception room scenes were recycled from several first season episodes, including the outfits worn by Galactic High Commissioner Ferris in "The Galileo Seven" and by Lazarus in "[[{{Recap/StarTrekS1E27TheAlternativeFactor}} The Alternative Factor]]". A female extra (Jeannie Malone) can be seen wearing a faux fur dress worn by Lenore Karidian in "[[{{Recap/StarTrekS1E13TheConscienceOfTheKing}} The Conscience of the King]]", complete with other recycled costume pieces. Another female alien is wearing Areel Shaw's civilian dress from "Court Martial", and a third one is wearing a costume left over from "[[{{Recap/StarTrekS2E14WolfInTheFold}} Wolf in the Fold]]". Scott's dress uniform was also reused on an extra playing a Starfleet delegate.

** Creator/LeonardNimoy named this as one of his favourites:

** D.C. Fontana has repeatedly named this as her favorite out of all the ''Star Trek'' episodes she wrote:

* UnderAgeCasting / PlayingGertrude: Mark Lenard was only seven years older than Leonard Nimoy, despite playing his father. The makeup people put grey in his hair to make him look older. In this case it also works because Vulcans live much longer and age more slowly than humans; in "The Deadly Years" while Spock is no less affected than Kirk, [=McCoy=] and the others, his aging is not nearly as pronounced.

-->I don’t do comic strips, and ''Star Trek'' is six or seven comic strips rolled into one.

** Russ Peek, who plays one of Sarek's aides, also appeared as mirror Spock's Vulcan bodyguard in "[[{{Recap/StarTrekS2E4MirrorMirror}} Mirror, Mirror]]".

* UnderAgeCasting / PlayingGertrude: Mark Lenard was only seven years older than Leonard Nimoy, despite playing his father. The makeup people put grey in his hair to make him look older. In this case it also works because Vulcans age differently than humans; in "The Deadly Years" while Spock is no less affected than Kirk, [=McCoy=] and the others, his aging is not nearly as pronounced.

* {{Blooper}}: ''Trek'' legend holds that during the operating room scenes, the wisps of smoke you can see emanating from behind the apparatus Bones is using to perform the cryogenic heart surgery is from Creator/DeForestKelley's lit cigarette. (He is known to have protested against Creator/GeneRoddenberry's edict that there be no smoking in the future and was likely thrilled to have a chance to hide his ciggie behind a giant prop.)

* UnderAgeCasting / PlayingGertrude: Mark Lenard was only seven years older than Leonard Nimoy, despite playing his father. The makeup people put grey in his hair to make him look older.

* UnderAgeCasting: Mark Lenard was only seven years older than Leonard Nimoy, despite playing his father. The makeup people put grey in his hair to make him look older.

** D.C. Fontana has repeatedly named this as her favorite out of all the ''Star Trek'' episodes she wrote: -->It went into the Vulcan relationships between families. I think that's a story that's universal and timeless – that communication between parents and children. And that to me was the big story. The rest of it was an adventure, it was a spy story, it was a mystery, it was an action story – but all in all it was really about the parents and the child... There had still been a vast lack of communication between them and they needed to find each other as parent and child.

* YouLookFamiliar: Mark Lenard also played the Romulan Commander from "Balance of Terror".