- 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
Known more commonly as the Tox Uthat, the inhibitor could stop the nuclear reaction that takes place within stars. It was invented in the twenty-seventh century by Kal Dano.