THE VILE FRONTIER. The elites are at it again! Kirk & Spock are tortured for the amusement of a bunch of blue-blooded assholes in order to compel Dr. McCoy to give up his Starfleet commission and become their personal physician. It's The Original Series most notable examination of class warfare that resonates to this very day! It also features singing and dancing loooooong before "Subspace Rhapsody" AND one of the first interracial kisses on television, though it's not as historic as it was once made out to be.  

The grades begin at (17:58).