Before Jennifer O'Neill and later Yvette Mimieux were considered for Dr. Kate McCrae, director Gary Nelson reportedly viewed an emerging actress named Sigourney Weaver as a possibility for the role. The casting department's reaction was not based on a screen test, a reported conflict, or a concern about her performance. According to the production history, the head of casting rejected Weaver because her unusual first name was considered a problem. Weaver, who would soon become internationally famous as Ellen Ripley in Alien (1979), was therefore denied the opportunity on an image-conscious decision that now looks almost absurdly arbitrary. The episode captures the old studio mentality in which executives could treat an actor's name, appearance, or marketability as a product feature to be approved or rejected before talent was even fully assessed. The Black Hole ultimately used Mimieux, while Weaver's career was transformed by Alien, released the same year.
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