While McGivers apparently had her own interests in mind throughout the episode, as she was fully aware who Khan was long before Kirk, and given her background, there was clearly no reason how or why she would have identified Khan by a religion, based on appearance alone. Her lines to that effect was chastised in the 13 December1966 review of the script by de Forest Research. There, it was stated that "a "Sikh" is a member of the Sikh religion, not a racial type, any more than a Roman Catholic is a racial type. They are distinguishable physically only because one of the tenets of their religion is that men do not shave or cut their hair." Despite de Forest's attempt to have the writers correct the error, the term ultimately remained.