Kelta Prime
Kelta Prime was a planet that figured into the original backstory of  character Perra, who was later renamed Seven of Nine. The planet and an outpost located on it were mentioned in a group of casting sides that written in  and were used for auditioning the part. According to Perra in this document, she had witnessed her friends being slaughtered around her on the Kelta Prime outpost and her Humanity had meanwhile "died", an incident that took place a long time before she encountered the  and its crew. 

Unused production material