- Star Trek: The Motion Picture
- Star Trek II: The Wrath of Khan
- Star Trek III: The Search for Spock
- Star Trek IV: The Voyage Home
- Star Trek V: The Final Frontier
- Star Trek VI: The Undiscovered Country
- Star Trek Generations
Neurologist whom Barclay claimed was attempting to retrieve the 'real' Dr. Lewis Zimmerman from his malfunctioning holo-novel. Kaplan's existence has yet to be conclusively verified.