Dagger of the Mind
The inspection of the Tantalus Penal Colony results in the discovery of dangerous experiments on the inmates and staff, being performed by the colony’s director. Adams: James Gregory. Helen: Mariana Hill. Van Gelder: Morgan Woodward. Kirk: William Shatner. Spock: Leonard Nimoy. McCoy: DeForest Kelley. Uhura: Nichelle Nichols.