At the very end of Star Wars Episode 1: The Phantom Menace movie, Mace Windu and Yoda had this conversation:

Mace Windu: There is no doubt. The mysterious warrior was a Sith.
Yoda: Always two there are....no more...no less. A master and an apprentice.

From this conversation, it's clear that they had no idea about the other Sith (They were surprised to see one Sith). They were just using their knowledge of Rule of Two to guess that one other must be alive.

In Star Wars Episode 3: Revenge of the Sith, Yoda addressed Palpatine as Darth Sidious. I thought, Yoda discovered Palpatine's Sith name from security hologram (he watched at Jedi Temple).

But, in the last episode of Star Wars: The Clone Wars - The Lost Missions (Unfinished season 6), Yoda called Darth Sidious by his name.

How does Yoda know the name of Darth Sidious? Has Yoda encountered Darth Sidious after the events of TPM?

  • If the rule of two is absolute, why be surprised at one Sith. There must always be two about by the Rule of Two.
    – Oldcat
    Commented Oct 20, 2014 at 20:42
  • 1
    @Oldcat They believed that Sith were extinct..
    – user931
    Commented Oct 21, 2014 at 2:02

1 Answer 1


I think the answer is just that Dooku told Obi-Wan the name in Attack of the Clones, and Obi-Wan reported it to the council. From the transcript here:

COUNT DOOKU: The dark side of the Force has clouded their vision, my friend. Hundreds of Senators are now under the influence of a Sith Lord called Darth Sidious.

OBI-WAN: I don't believe you.

COUNT DOOKU: The Viceroy of the Trade Federation was once in league with this Darth Sidious. But he was betrayed ten years ago by the Dark Lord. He came to me for help. He told me everything. The Jedi Council would not believe him. I tried many times to warn them but they wouldn't listen to me. Once they sensed the Dark Lord's presence, it would then be too late. You must join me, Obi-Wan, and together we will destroy the Sith.

And later:

OBI-WAN: Do you believe what Count Dooku said about Sidious controlling the Senate? It doesn't feel right.

YODA: Becoming unreliable, Dooku has. Joined the dark side. Lies, deceit, creating mistrust are his ways now.

MACE WINDU: Never the less, I feel we should keep a closer eye on the Senate.

YODA: I agree.

  • 35
    Then, gentlemen, why the f*** haven't you kept a closer eye on the Senate?! Commented Jul 27, 2014 at 9:29
  • 4
    Because it's called "stalking" and in most civilized systems isn't legal. Also, I don't think Jedi are supposed to be competent in the game of espionage and politics. Commented Nov 25, 2014 at 17:13
  • 1
    @DarthHunterix Like Ned Stark?
    – BCLC
    Commented Feb 25, 2016 at 8:08
  • 1
    Actually Ned was supposed to be competent, since he was a nobleman and a ruler of a good chunk of the country. He just wasn't. Commented Feb 25, 2016 at 8:40
  • 8
    Interesting also in that Dooku even identifies Sidious to Obi-Wan and they still don't pick up on it. Because Palpatine at that point is Chancellor and therefore literally has "hundreds of Senators" under his "influence".
    – wberry
    Commented Jun 9, 2018 at 2:11

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