According to The Twilight Zone Companion, Liza Minnelli auditioned for the role of Mary Rachel, but was so nervous during the audition she was rejected. Although this was the third-to-last episode broadcast, this was the last episode in the series to be filmed.
In line with The Twilight Zone Companion, Liza Minnelli went through a casting process for the role of Mary Rachel, but her high-strung nature during the audition resulted in her not getting the part. Notably, this episode was the final one to be captured on film before the series ended.