Darth Vader Wars Holiday Special", a television special broadcast by CBS in 1978, features a brief appearance by Darth Vader, who appears on-screen speaking with Imperial officer "Chief Bast" in footage cut from the original 1977 film. The sequence is dubbed with new dialogue, performed by James Earl Jones. In the story, Vader colludes with Boba Fett to entrap the Rebels. Darth Vader features in the 1981 radio drama adaptation of "Star Wars", voiced by the actor Brock Peters. Vader makes his first appearance on the planet Ralltiir, where he treats Princess Leia Organa with suspicion. In later extended scenes, he is
Star Wars: Episode III – Revenge of the Sith state to fight a Sith Lord. These are a few examples of many descriptions of characters' feelings and inner narrative. There are even some humorous lines added in, including extra dialogue in the battle between Grievous and Obi Wan - Grievous says, "I was trained by Count Dooku," and Obi-Wan replies, "What a coincidence; I trained the man who killed him." An official prequel novel, "Labyrinth of Evil" () by James Luceno, was published in 2005. It is set near the end of the Clone Wars and directly before the events of "Star Wars: Episode III Revenge of the Sith".