Spock toby jug produced by Kevin Francis Ceramics of Stoke-on-Trent, England, in a 1996 limited edition of 750. Spock is a fictional character in the Star Trek media franchise. He first appeared in the original Star Trek series serving aboard the starship USS Enterprise as science officer and first officer and later as commanding officer of the vessel. Spock's mixed human-Vulcan heritage serves as an important plot element in many of the character's appearances. Along with Captain James T. Kirk and Dr. Leonard "Bones" McCoy, he is one of the three central characters in the original Star Trek series and its films. After retiring from active duty in Starfleet, Spock served as a Federation ambassador, and later became involved in the ill-fated attempt to save Romulus from a supernova, leading him to live out the rest of his life in a parallel universe. A stela with the Vulcan greeting "Live Long and Prosper" forms the handle of the jug.