Helen Trask
In the second draft of the  first season episode , Lieutenant Helen Trask was to be an engineering division officer present on 's bridge. She was to be seated across from Nyota Uhura's communications console, working under Montgomery Scott's supervision as his engineering assistant.

The script described her as "a tall young woman with short, curly blond hair." She also was to second Uhura's assertion that she did not consider the Taurean signal a summons. In the final episode, Scott is working at the station alone and Uhura's opinion is not seconded by anyone, merely noted by Kirk. 

An outline of Trask appeared in early storyboard sketches of the episode. (Star Trek: The Official Guide to the Animated Series, p. 51)

Unused production material