Spock's Brain vs Shades of Grey. The idea of worst episode is subjective, yet most would agree that "Spock's Brain" and "Shades of Grey" are some of Trek's worst episodes within The Original Series and The Next Generation, respectively. With the help of Ken Tripp from Standard Orbit, your hosts of Earl Grey discuss the plot lines, the writing staff, and extenuating circumstances around the release of these two episodes.