- 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
Klingon interrogation device that probes the minds of its victims. At high setting, the sifter causes irreversible brain damage. In 2267, Commander Spock was subjected to questioning by Klingon forces on Organia using a mind-sifter, but he was able to use Vulcan disciplines to endure the experience.