The slanting crawlway that leads up to the warp-drive nacelles is referred to as a Jefferies tube. This is a reference to art director Walter M. Jefferies.
Many guest voices were actually supplied by James Doohan, including those of Sargon (Return to Tomorrow), the M-5 and Commodore Enwright (The Ultimate Computer) and a radio announcer (A Piece of the Action).
In the original series, the 'arrowhead' badge worn by the crew of the Enterprise was meant to be an insignia for the Enterprise only. If you'll notice on any guest Starfleet character, they all wear different symbols on their uniforms.
In 1968, Star Trek's most critically acclaimed episode, 'The City on the Edge of Forever,' written by Harlan Ellison, won the prestigious 'Writers Guild of America Award' for Best Original Teleplay.
After the popularity of The Monkees, the producers decided to introduce Ensign Pavel Chekov in the second season in order to attract more teenage viewers, especially girls, to the show. Walter Koenig was selected due to his resemblance to Davy Jones.
Sulu and Uhura didn't have first names in this series. Though, Sulu's was later established as Hikaru in 'Star Trek VI: The Undiscovered Country.' Uhura's was never established in the TV series or on film. In the new prequel movie, 'Star Trek' (2009), Uhura's first name Nyota is finally made official.
Grace Lee Whitney was supposed to be the lead female character, hence her prominent role as Yeoman Janice Rand in the first season. However, the producers let go of the character after the first season.
In several episodes, prop beverage bottles were modified from existing alcohol bottles. Aldeberan Whiskey bottles were Cuervo Gold 1800 Tequila bottles. Bottles used for Saurian Brandy were George Dickel Tennessee Sour Mash Whiskey carafes.
The series running I'm a doctor, not a ... gag originated in the comedy film 'The Kennel Murder Case.' The coroner, played by Etienne Girardot, repeatedly claims to be a doctor not a reporter, detective, etc.
The series was created during a time of Cold War politics, and the plots of its episodes occasionally reflected this with spacefaring civilizations, including the Klingons and the Romulans, used to symbolize the Soviet Union and the People's Republic of China.
One of the writers, D.C. Fontana, was told to use the initials 'D.C.' by Gene Roddenberry because networks at the time generally wouldn't hire women writers. Her first name is Dorothy.
In the first season of 'Star Trek', only William Shatner and Leonard Nimoy had their names appear in the opening credits. It wasn't until the start of the second season that the opening credits were slightly extended to include DeForest Kelley as well.
In many episodes, alien art work and wall hangings were in reality discarded protective Styrofoam shipping box liners from tape recorders used by fellow Desilu/Paramount show 'Mission: Impossible,' spray painted and arranged into various combined forms.
According to official blueprints of the Enterprise, published in 1975, among features on the ship that were never mentioned on the TV series were two auxiliary bridges, a second sickbay area, a swimming pool, a garden, and a six-lane bowling alley.
Scotty's full name is Montgomery Scott. The name was improvised on the spot by James Doohan and Gene Roddenberry: Scott because Roddenberry liked Doohans Scottish brogue, and Montgomery because its Doohans middle name.
Mark Lenard was the first actor to play a member of all three of the major alien races: Mark Lenard was the first actor to play a member of all three of the major alien races: vulcan (Spock's father), Romulan (TOS episode: 'Balance of Terror'), and Klingon (the commander of the Klingon attack group at the beginning of 'Star Trek: The Motion Picture'). Vulcan (Spock's father), Romulan (TOS episode: 'Balance of Terror'), and Klingon (the commander of the Klingon attack group at the beginning of 'Star Trek: The Motion Picture').