As noted in this question (similar, but not duplicate), Obi-Wan did know that Anakin was not dead, and that he was, in fact, Darth Vader. In this question, it is clear that the fact that Anakin was Darth Vader was not common knowledge at all.

So when how did Obi-Wan know Anakin had become Darth Vader? I don't recall reading any EU novels with any interaction between them.

Did he know at the time of their duel on Mustafar that Anakin was called 'Darth Vader'? If so, then he simply would have heard about Vader in other events and this is a dumb question

  • 13
    He used the Force, Luke.
    – Xantec
    Commented May 13, 2013 at 20:36
  • @4ichard - that does not answer thw question. None of the answers say how he knew - they all met mention that he knew.
    – The Fallen
    Commented Nov 7, 2014 at 14:37
  • @ssumner - Gnovice' answer seems to answer this question. He left him for dead, then felt with the Force that he might not be, then got confirmation when the remaining Jedi rallied against Vader.
    – Valorum
    Commented Nov 7, 2014 at 15:21
  • 1
    @Richard - no, it absolutely does not. I am well aware (and linked to that question) that Obi-wan knew Vader was Anakin after Mustafar - my question was how he found out at/before Mustafar. Gnovices' answer does not refer to events pre-Mustafar
    – The Fallen
    Commented Nov 7, 2014 at 15:42
  • 1
    @Zibbobz We really don't. Everything in the other question is about Anakin/Vader's fate, not identity.
    – phantom42
    Commented Nov 7, 2014 at 16:34

1 Answer 1


Obi-Wan saw a security hologram of Palpatine/Sidious referring to him as "Lord Vader"

From the script:


OBI-WAN enters the Main Control Center with YODA and heads for the hologram area.

OBI-WAN: Wait, Master. There is something I must know . . .

YODA: If into the security recordings you go, only pain will you find.

OBI-WAN: I must know the truth, Master.

OBI-WAN moves to a panel and flips some switches. He sees a HOLOGRAM of ANAKIN slaughtering JEDI, including the YOUNG ONES. OBI-WAN and YODA react.

OBI-WAN: (continuing) It can't be . . . It can't be . . .

As ANAKIN surveys the carnage, a DARK-ROBED SITH LORD enters. ANAKIN turns to DARTH SIDIOUS and kneels before him.

ANAKIN: The traitors have been taken care of, Lord Sidious.

DARTH SIDIOUS: Good . . . good . . . You have done well, my new apprentice. Do you feel your power growing?

ANAKIN: Yes, My Master.

DARTH SIDIOUS: Now, Lord Vader, now go and bring peace to the Empire.

OBI-WAN watches in horror. Tears well up in his eyes.

  • 1
    What script is this from? I'm assuming The Clone Wars, as I don't recognize it, but it could also simply be a scene from the horrid prequels that I've simply forgotten...
    – Kromey
    Commented May 1, 2014 at 21:41
  • 8
    @Kromey Revenge of the Sith
    – phantom42
    Commented May 2, 2014 at 0:44

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