Merritt Butrick: Merritt Butrick. Actor: Star Trek II: The Wrath of Khan. Merritt Butrick was an American actor from Gainesville, Florida. He is primarily remembered for portraying Dr. David Marcus in the science fiction films "Star Trek II: The Wrath of Khan" (1982) and "Star Trek III: The Search for Spock" (1984). His character was depicted as a son of the Starfleet officer James Tiberius "Jim" Kirk (played by William Shatner) and...