- 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
Inhabitant of the Delta Quadrant. Daelen's genome was stolen by Steth sometime prior to Stardate 51762. While in the body of a woman who was Steth's previous victim, Daelen caught up with his original body when it was occupied by Tom Paris. Paris and Daelen returned to Voyager and were able to compel Steth to return their bodies.