5. There Would be no Star Trek Crossover Show
When Florence Henderson showed up for her screen test, she needed someone to do her makeup. As there were no makeup artists on the set that day, she poked her head into another studio. There, they were filming Star Trek, a good place to find a studio makeup artist. While Henderson waited for an artist, she took a seat between two actors, Leonard Nimoy and William Shatner. At the time she was nobody, which might explain why neither actor spoke a word to her. They also might have been studying lines.