- 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
Captain Picard, believing the Ferengi bandits initiated this withdrawal of energy, announces the U.S.S. Enterprise's willingness to resolve the situation. However, the Ferengi vessel reports that it faces the same predicament.
In an effort to discover who or what has tampered with their energy supplies, away teams from both the Ferengi and U.S.S. Enterprise starships beam down to investigate the desolate planet.
After a confrontation with the Ferengi enemy, a mysterious being known only as Portal, guardian of the Tkon Empire, materializes before both away teams inquiring, "Who will meet the challenge?" Portal, disenchanted with the Ferengi's barbaric and warlike responses to his inquisition, is intrigued by Commander Riker's wisdom. Once Riker passes several of Portal's intellectual "tests," power is again restored to the respective starships.