- 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
Thought amplifier used by the aliens Korob and Sylvia. The transmuter could convert their thoughts into physical objects or convincing illusions. With the transmuter, Korob and Sylvia disguised themselves as humanoids and captured various crew members from the U.S.S. Enterprise NCC-1701. In effecting escape, Captain Kirk destroyed the transmuter, which also resulting in the deaths of Korob and Sylvia.