The basics.

This question is based on an answer I posted on the “Movies and TV” Stack Exchange which asked about how Darth Vader discovered Luke Skywalker was his son and how the logic/rationale over the years seems to have changed to the point of… Arrrgh!

Long story short: Depending on what version of the script/movie existed, Darth Vader either always knew who Luke Skywalker or was clueless/oblivious. But if—as implied in the 2004 DVD re-dubbing/re-working—Darth Vader first learns about his Luke being his son from the Emperor… Then where—or how—did the Emperor discover this information? Or did the Emperor know all along and was just holding onto the info until just the right moment to push Darth Vader’s buttons?

And heck, look at the opening crawl for The Empire Strikes Back; bold emphasis is mine:

It is a dark time for the Rebellion. Although the Death Star has been destroyed, Imperial troops have driven the Rebel forces from their hidden base and pursued them across the galaxy.

Evading the dreaded Imperial Starfleet, a group of freedom fighters led by Luke Skywalker has established a new secret base on the remote ice world of Hoth.

The evil lord Darth Vader, obsessed with finding young Skywalker, has dispatched thousands of remote probes into the far reaches of space....

Is the mention of Skywalker in this opening crawl just a high-level narrative clarification for the viewer or did Darth Vader actually know who Skywalker was and by the time the audience is viewing The Empire Strikes Back we are watching an obsessed Darth Vader on a personal revenge mission?

The 1980 film dialogue of the Darth Vader and Emperor conversation implies Darth Vader knows who Skywalker is and the Emperor is a bit clueless. The 2004 DVD re-dubbing implies that Darth Vader is clueless and the Emperor is the one who knows who Skywalker is.

Wait… Then what does this opening crawl mean the retconned context of Darth Vader’s seeming cluelessness towards Luke Skywalker? He has a personal fleet on the hunt for… Just the Rebels? Then why mention “Skywalker” in the opening crawl like that? Why not say; bold emphasis is mine:

The evil lord Darth Vader, obsessed with finding the Rebels, has dispatched thousands of remote probes into the far reaches of space....

Here are script changes that make my head spin.

The fifth draft of the script implies Skywalker is just some guy they need to hunt down.

For example—as seen on page 90 of Star Wars • Episode Five • The Empire Strikes Back By Leigh Brackett and Larry Kasdan from the Novel by George Lucas (Fifth Draft: February 20, 1979)—was scripted like this:

Highlighted screenshot from page 90 of the 5th draft of the script for “The Empire Strikes Back.”

EMPEROR: Our situation is most precarious. We have a new enemy who cold bring about our destruction.

VADER: Our destruction? Who?

EMPEROR: The son of Skywalker. You must destroy him … or he will be our undoing.

VADER: He’s not a Jedi, he’s just a boy. Obi-Wan could not have taught him so much that …

The 1980 release dialogue implies Darth Vader knows who Luke is, but his hiding this information from the Emperor.

But, in the 1980 release of The Empire Strikes Back the dialogue was released to the public as follows. To me it reads as if the Emperor is the one who is in the dark about Luke Skywalker’s lineage and Darth Vader is conning the Emperor to “trust him” to get Luke on their side:

VADER: What is thy bidding, my master?

EMPEROR: There is a great disturbance in the Force.

VADER: I have felt it.

EMPEROR: We have a new enemy - Luke Skywalker.

VADER: Yes, my master.

EMPEROR: He could destroy us.

VADER: He’s just a boy. Obi-Wan can no longer help him.

EMPEROR: The Force is strong with him. The son of Skywalker must not become a Jedi.

VADER: If he could be turned, he would become a powerful ally.

EMPEROR: Yes. Yes. He would be a great asset. Can it be done?

VADER: He will join us or die, my master.

The 2004 re-dubbing makes it seem that Darth Vader is oblivious to his children and the Emperor is the one who breaks the news.

And then the 2004 post-Star Wars Episode III: Revenge of the Sith “Special Edition” DVD redubbed the dialogue to be this:

EMPEROR: We have a new enemy, the young rebel who destroyed the Deathstar. I have no doubt this boy is the offspring of Anakin Skywalker.

VADER: How is that possible?

EMPEROR: Search your feelings, Lord Vader. You will know it to be true. He could destroy us.

VADER: He is just a boy.

Okay, each iteration of this scene implies something different. But the 1980 dialogue seems more sensical. Darth Vader knows who Luke is and is just “playing dumb” to make a power play by using Luke as the “Ace up his sleeve.”

But this 2004 retconned logic makes Darth Vader completely submissive to the Emperor who is “all knowing.” But how did the Emperor know who Luke is and his connection to Anakin Skywalker? Was this just a bit of knowledge the Emperor proverbially “Saved for a rainy day?” Is this something from the prequels I missed or is it something else?

  • 1
    The short answer is that we don't know. The Emperor evidently gained this knowledge before Vader did, but we don't know how he gained it.
    – Valorum
    Dec 20, 2015 at 10:34
  • 1
    We know that Vader is pursuing the man who destroyed the Death Star in ANH.
    – Valorum
    Dec 20, 2015 at 14:46
  • 5
    Ah, well in the retconned continuity, Vader found out who Luke was between the films. He tracked Luke back to Tatooine and his bounty hunter ally; Boba Fett found out Luke's name. It won't surprise you to learn that Vader was somewhat displeased at learning of the deception by Obi-Wan.
    – Valorum
    Dec 20, 2015 at 14:55
  • The problem is that when writing additional material that happens in the "gaps" in a series, you often end up conflicting with the characterisations in the original films/books/whatever.
    – Valorum
    Dec 20, 2015 at 15:09
  • 2
    Why can Vader still not be playing dumb with the Emperor when he says "how is this possible"? This line doesn't prove Vader's ignorance any more or less than the previous iterations of the dialogue. Feb 2, 2016 at 11:01

3 Answers 3


This is the main thrust of the current run of the Star Wars and Darth Vader comics that take place between A New Hope and Empire Strikes Back. It is "Disney canon" (official canon post-Disney purchase).

  • Star Wars (2015) #1-4: Luke encounters Darth Vader on a mission to destroy an Imperial weapons factory. They have a short conversation where Vader realizes Luke's connection to Obi-Wan, recognizes his old light saber, and says the great line "I have killed many fathers".

  • Darth Vader (2015) #1: Vader sends Boba Fett after him with the description "There is an X-Wing pilot. He... knew an Obi-Wan Kenobi. He left this planet aboard a smuggling vessel called the Millennium Falcon."

  • Star Wars (2015) #5-6: Luke returns to Tatooine to look for information in Ben's old hut. Also, Boba Fett is looking for him and beats the nickname Wormie and the name Skywalker out of one of Luke's old "friends". Luke gets away but Boba Fett returns to Vader with the name "Skywalker".

Even if you don't consider the Disney comics to be canon, it is improbable that the Rebellion was able to keep the names Skywalker and Solo from Imperial intelligence for very long. Especially after the ceremony at the end of A New Hope. Both the Emperor and Vader probably know about his role in the destruction of the first Death Star long before that conversation. With Vader offering Luke help to overthrow the Emperor later in the movie, one would assume that he already has his own plots in motion.

  • Also, the scene in the comics where he discovers he has a son is very powerful. May 24, 2016 at 23:03
  • 2
    "Even if you don't consider the Disney comics to be canon" - doesn't matter if someone thinks this or not. They are. Same canon as the films, TV, and books. Lucasfilm Story Group is ensuring everything is a cohesive whole
    – NKCampbell
    Jul 19, 2016 at 22:23

The Emperor is a politician, and politicians live to gossip, a characteristic that Palpatine clearly has as you can see in Episode I: The Phantom Menace. It is easy to speculate that the Emperor got the knowledge via gossip.

Why Vader is so oblivious to the existence of his own son isn't so hard to understand. He passed through a very traumatic near-death experience in which he lost a lot, physically, mentally, and emotionally, leaving few memories of his old self. He doesn't even use his own name and is heavily manipulated by the Emperor. If he remembers that he had a son - he never saw him in person - he may remember him as a baby. But if he knows about Luke and Leia, he can hide that knowledge to protect them.

  • 2
    Can you cite any of this?
    – user38763
    Jan 12, 2016 at 18:36
  • "as you can see in Episode I: The Phantom Menace" is a citation (admittedly, rather broad).
    – TOOGAM
    Apr 7, 2018 at 17:31
  • To add to this, the emperor told Vader that he'd killed Padmé in his anger. There was no reason for Vader to believe otherwise, until asked to in the updated episode 4. Recall that Episode 4 was written and produced decades before the prequels. Therefore, there are reasons, both in- and out of universe, for the change. Canonically, Vader never saw any of his children until episode 4, since they were born while he was being prepared to receive his suit.
    – Tom Lint
    Dec 9, 2019 at 14:27

When the stormtroopers are on Tatooine looking for the droids, they kill Vader's step-brother and sister-in-law. I doubt Vader would have left anything that important to a troop of stormtroopers. He would have most likely discovered Luke's existence then. Though there is no direct evidence of Vader's involvement with the murder of his step brother. They are on the same farm and anything occurring there would be suspect to him.


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