- 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 species from another time continuum which can assume other forms and uses gravity wells as a nest for its young . Some mistook a Romulan warp core's artificial quantum singularity as a nest, sent the Warbird into distress, and then fractured time when the responding Galaxy-class Enterprise's power transfer beam locked on.