The change in Gary and Elizabeth's eyes was accomplished by Gary Lockwood and Sally Kellerman wearing sparkly contact lenses. They consisted of tinfoil sandwiched between two lenses which covered the entire eye. Wearing the lenses was difficult for Lockwood. He could only see through the lenses by looking down while pointing his head up. Lockwood was able to use this look to convey Mitchell's arrogant attitude.
The lenses were made over a weekend by Los Angeles optician John Roberts, who was hired by Associate Producer Robert H. Justman. Justman felt obligated to try wearing them before asking any actors to do so and managed to for several hours. He found them to be incredibly uncomfortable, but as long as they were only worn for brief periods, they were safe.
The lenses were made over a weekend by Los Angeles optician John Roberts, who was hired by Associate Producer Robert H. Justman. Justman felt obligated to try wearing them before asking any actors to do so and managed to for several hours. He found them to be incredibly uncomfortable, but as long as they were only worn for brief periods, they were safe.
The first time in US TV history that a second pilot for an hour-long series had to be submitted to convince the network to air it.
The phaser rifle that Kirk uses appears for the first and only time in the series. However, it can be seen on many pre-season 1 promotional photos.
The only episode in which Captain Kirk does not have the pointed sideburns that he sports throughout the series and films. In this episode, his sideburns are cut normally. Only Spock has the pointed sideburns.
The gap in time between filming this and the rest of the series explains some of the apparent inconsistencies, notably some changes in the Enterprise architecture, the fact that most of the female crew members wear trousers, and Mr Spock's distinctive yellowish skin tone.
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