The Clone Wars - S2E8 - "Brain Invaders"

5:12 - Barriss Offee:  "Master Windu has said we are keepers of the peace, not warriors."  Barriss refers to a meeting between Chancellor Palpatine and the Jedi (including herself) in Attack of the Clones where Mace Windu says, "We're keepers of the peace, not soldiers" [4:49].

6:06 - Clone pilot (after other clones point blasters at him):  "What the?"  In Attack of the Clones, an alien on Coruscant makes this same exclamation as he sees Obi-Wan flying through traffic while hanging from a droid [15:08]; Han says it in A New Hope after emerging from hyperspace into a meteor shower [1:03:15]; and in Return of the Jedi, a scout trooper says this after being hit by Wicket [1:05:38].

11:50 - Ahsoka: "I have a bad feeling about this, Master Fisto."

12:42 - Ahsoka (to Rex):  "Boy, am I glad to hear your voice."  Luke says something similar in A New Hope:  "Ben Kenobi?  Boy, am I glad to see you!" [30:35]

14:06 - Anakin (to the clone troopers guarding Poggle the Lesser):  "Leave us."  Palpatine has similar lines twice in the movies:  "Leave us" to his entourage at the opera in Revenge of the Sith [43:44] and "Guards, leave us" to the Imperial guards in Return of the Jedi [1:30:55].

18:28 - Ahsoka directs the exhaust from a hose at Barriss, similar to what Luke does to Vader in The Empire Strikes Back [1:44:37].

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There are brief cues of the Imperial March at 5:49 when Ahsoka talks about Anakin's future and at 14:02 when Anakin goes to interrogate Poggle.

The Clone Wars - S2E7 - "Legacy of Terror"

11:10 - Anakin (about the Geonosian mind control):  "That can't be true.  That's impossible."  Luke says something similar when Vader tells him about his father in The Empire Strikes Back:  "That's not true.  That's impossible." [1:51:21]

13:45 - Anakin:  "I've got a bad feeling about this."

The Clone Wars - S2E6 - "Weapons Factory"

5:01 - Luminara:  "It's decided then."  Mace Windu uses a similar expression in Revenge of the Sith:  "It's settled then; Yoda will take a battalion of clones to reinforce the Wookiees on Kashyyyk" [38:08].

7:24 - Tactical droid (to Geonosian):  "You may now commence attack."  Admiral Ackbar uses the same expression in Return of the Jedi:  "Commence attack on the Death Star's main reactor!" [1:54:46]

8:55 - Barriss (to Ahsoka):  "Trust me."  Han also says this (to Leia) in The Empire Strikes Back [1:20:06].

10:51 - Tactical droid (to Poggle the Lesser, about the supertanks):  "We have twenty units ready now and many more on the way."  In his conversation with Obi-Wan, Lama Su similarly appraises the clone army in Attack of the Clones:  "Two hundred thousand units are ready with a million more well on the way" [42:48].

11:46 - Rex (to the clone gunners):  "Steady, steady."  In The Phantom Menace, Jar Jar also says this to the Gungan soldiers [1:48:30].

12:31 - Tactical droid:  "Two Jedi in the control room?  That is impossible."  In The Empire Strikes Back, Luke also says, "That's impossible" [1:51:21].

14:21 - Luminara Unduli (to Anakin):  "I see what you have in mind."  It's probably just coincidence, but Han Solo has a similar line in A New Hope:  "Don't worry, Chewie; I think I know what he [Luke] has in mind" [1:12:12].  In The Empire Strikes Back, Leia also asks Han, "What'd you have in mind for your next move?" [1:14:52].

16:36 - Luminara:  "My padawan will not fail."  Palpatine says almost the same thing in Attack of the Clones:  "My negotiations will not fail" [4:40].

18:18 - Anakin:  "Master Luminara, don't worry."  "Don't worry" also appears in Attack of the Clones (Anakin tells Padmé, "Don't worry; I've given up trying to argue with you" [1:36:02]), A New Hope (Obi-Wan tells R2-D2, "Oh, don't worry; he'll be alright," referring to Luke [30:17]; Han tells Chewbacca, "Don't worry, Chewie; I think I know what he [Luke] has in mind" [1:12:12]; and Han tells Leia, "Don't worry; she'll hold together," referring to the Millennium Falcon [1:34:57]), and in The Empire Strikes Back (Han tells Leia, "Don't worry" [1:20:04]).

The Clone Wars - S2E5 - "Landing at Point Rain"

5:08 - Ki-Adi Mundi:  "There is no such thing as luck."  In A New Hope, Obi-Wan says the same thing:  "In my experience, there's no such thing as luck" [1:02:17].

8:42 - Anakin (to Ahsoka):  "Hey, I'm worried about him too, but you have to keep your mind in the here and now; otherwise, we'll never be able to help Obi-Wan."  This echoes what Qui-Gon tells Obi-Wan at the beginning of The Phantom Menace:  "Keep your concentration here and now where it belongs" [3:16].

11:52 - Anakin:  "Hey, it's not my fault."  "It's not my fault" also appears three times in The Empire Strikes Back.  Han [1:07:00 and 1:07:02] and Lando [1:56:52] both say this when the Millennium Falcon's hyperdrive doesn't work.  Han also says, "It's not my fault" in Return of the Jedi as he's explaining to Jabba why he didn't pay him [20:26], and in A New Hope, C-3PO, speaking to Luke after R2 disappears, has a similar line:  "It wasn't my fault, sir" [26:21].

12:17 - Ki-Adi Mundi:  "All I can do is trust my instincts. "  This bears some resemblance to what Qui-Gon tells Anakin before the podrace in The Phantom Menace:  "Feel, don't think; use your instincts" [57:47].

13:07 - Anakin:  "Ahsoka and I will handle this."  This is similar to what Qui-Gon says (referring to himself and Obi-Wan) when Darth Maul appears in The Phantom Menace:  "We'll handle this" [1:50:29].  To a lesser degree, it's also similar to Obi-Wan's "Anakin and I can handle this" in Attack of the Clones [2:03:07].