When Spock is stricken down by a disease fatal to Vulcans, the Enterprise is to meet a freighter with a load of drugs that provides the only cure, but Orion pirates attack the ship and Kirk must track down the Orions and the drug before it is too late.
Casts:
William Shatner, Leonard Nimoy, DeForest Kelley, George Takei, Nichelle Nichols, James Doohan, Majel Barrett