- 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
Planet: Caldonia. A race of three-fingered beings over six feet tall, their enlarged cranium includes a raised bony framework shaped much like a perpendicular "theta" Greek letter. Primarily scholars on a world committed to pure research, they bid for the rights to the Barzan wormhole until negotiator Leyor pulls out after some persuasion that Caldonians might not be willing to take on the mundane administration of the phenomenon.