- 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
Appearing as a brown-skinned satyr with two horns and a bare torso, Lucien is a magic-wielder on Megas-Tu. A generalist practitioner among the specialists of his world, he was known as a troublemaker. In 2269 (stardate: 1254.4), he helps the Enterprise crew because he does not want to continue to isolate his people. At some point in Earth's past, he visited there and loved the planet, but eventually returned to Megas-Tu. A fellow Megan revealed his other name was "Lucifer," but whether that was the Lucifer of religious import has not been established. One of Lucien's magic words is "Rhadamanthus," though he generally casts magic spells by gesturing with an open palm.