- 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
A branding device as might be used for livestock, carrying The Circle's logo, was used by three of its beleivers when they painfully burned the image onto Quark's forehead after jumping him alone when the bar had closed.