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It is the second series of the expanded radio dramatization of the original Star Wars trilogy, and lasts for a total of five hours. It was produced and broadcast by National Public Radio as part of NPR Playhouse as a follow-up to the success of the first radio series, Star Wars (1981).
The series was made with the full cooperation of George Lucas, who donated the rights and allowed the use of sound effects and music from the films. It is part of Star Warscanon within its Expanded Universe.
Unlike the first Radio Drama, Star Wars, The Empire Strikes Back follows a narrative much more closely aligned with the original film on which it is based. There are some small segments of action or dialogue which may be highlighted as treatments of Expanded Universe material, but the overall narrative does not diverge substantially from the original plot.
Episode V opens with the battle of Renegade Flight over Derra IV, during which Commander Narra is killed.
Obi-Wan Kenobi's apparition to Luke Skywalker in the Hoth snowstorm takes Luke by surprise—the dialogue suggests that this is the first time Luke has seen the spirit of Obi-Wan.
Expanded dialogue reveals Captain Needa begging Vader not to kill him after apologizing for losing the Millennium Falcon in the Hoth asteroid field. Vader goes on to remark that Needa is inept. This changed Needa's portrayal, as he had previously witnessed Vader's execution of Ozzel for improper tactics. Needa's willingness to accept responsibility for failure portrayed him as a man of integrity and principle. Begging Vader for his life lessened this gesture. Vader's assessment of Needa's ineptness being added also changed this interaction somewhat. It is likely that the dialogue was added to make clear to the audience what had happened, as no visual medium was present to portray Vader's execution of Needa.
We learn something of the background of 2-1B and how the medical droid once served in an Imperial medical facility.
At the climax of Luke Skywalker's lightsaber duel against Darth Vader in Cloud City, Luke audibly announces his decision to jump off the gantry into the service shaft, leaving the listener in no doubt that Luke intended to kill himself rather than join Vader.