- 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
Noncorporeal lifeform that has existed for centuries by journeying from planet to planet and feeding off fear. Among the murderous identities Redjac has held are Jack the Ripper on Earth, Kesla on Deben II, and Beratis on Rigel IV. Besides those instances of serial killings, Redjac is also believed responsible for the deaths of seven women in China, Earth, in 1932; five similar murders in the USSR, Earth, in 1974; eight murders in the Martian Colonies in 2105; and 10 murders on Alpha Eridani II in 2156. Hengist was the last known incarnation of Redjac, before being dispersed into space.