Beyond the Starfield: A Look Behind the Scenes by Clare Bradley.
In the Cage, Spock smiles, since his emotionless demeanor hadn't been devised yet. Even in the following episode, Spock displays some emotion, while saying that Earth emotions are foreign to him. Spock was the only character from The Cage to make it into the series.
An early idea for the Voyager series equipped the ship with a cloaking device.
Stardates were intended to keep the exact year of Star Trek's adventures somewhat vague, although it was later decided what dates they correspond to. Dialog references in the early episodes suggested various timeframes, ranging from 200 to 800 years in the future.
Tarbolde's love sonnet in Where No Man Has Gone Before was actually a poem written by Gene Roddenberry as a pilot speaking of his beloved airplane.
Roddenberry requested a camera test for the Orion dancer's make-up in the Cage, since things don't always look the same on film as they do to the naked eye. Majel Barrett allowed herself to be painted green for the test. When he viewed the test the following day, Barrett looked completely normal, and was not green at all. Roddenberry requested another test with more green. Again, Barrett did not appear green at all. During the third test it was discovered that the technician who developed the film wasn't told that she was supposed to appear green, so he corrected her coloring when he developed the film.
Phlox's nude scene in 'Doctor's Orders' began as a joke. John Billingsley joked with writer Chris Black at a party one night about Phlox operating naked, and crew members walk in and faint dead away, and later people are walking around the ship in awe of him. Black didn't believe Billingsley would do a nude scene, but he said he would, so Black wrote it as a sort of a dare.
