Question: What is the middle name of the fictional character, who used characters called spock and McCoy as his logical and emotional springboard, and who was captain of the starship USS Enterprise in an American Science fiction franchise which included an episode called Space Seed where the crew discover a sleeper ship holding superpeople from Earth's past? 
Sentence (from "James T. Kirk"): Often, the characters of Spock and Leonard McCoy act as his logical and emotional sounding boards, respectively.
Relevant evidence: Yes