James Griffith, the show's writer, consulted with famed astrologer Sydney Omarr on the technical aspects of the script. He outlined the personality traits, and Omarr determined the astrological signs that matched those traits.
Steve Ihnat(Col. Alex Stahl) and David Hurst(Victor Grigov) both had major roles on different episodes of Star Trek (1966).
Victor Grigov's birthday is May 5, 1915. Col. Stahl's is October 27, 1932.