- 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
Subterranean home city of the Loque'eque, a species that lost the ability to reproduce centuries ago and created a mutagenic virus in order to transform other species into their own. After contracting the virus, the altered humanoids experienced an overpowering urge to return to Urquat.