- 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
Homeworld of the Valakians and the Menk. The Valakians were devastated by a mysterious plague, while the Menk seemed to be immune. Dr. Phlox determined that the Menk would eventually become the dominant species on Valakis.