The Clone Wars - S2E16 - "Cat and Mouse"

0:58 - Anakin:  "Master Kenobi better get here soon or this is gonna be one short rescue mission."  This bears some similarity to what Han Solo says in A New Hope (also referring to Obi-Wan):  "I hope that old man got that tractor beam out of commission or this is gonna be a real short trip" [1:32:55].

3:33 - Admiral Trench:  "I have won this round."  Perhaps coincidentally, Padmé uses this same phrase in The Phantom Menace, referring to the Trade Federation battle droids:  "They win this round" [1:58:17].

5:08 - Obi-Wan (to Anakin):  "I need you to run a mercy mission down to the planet's surface" and a bit later (5:26):  "I need you to continue the mercy mission."  Darth Vader also uses the phrase "mercy mission" in A New Hope when he says to Leia, "You weren't on any mercy mission this time" [7:47].

11:48 - Bail Organa:  "Help us, General Kenobi; you're our only hope."  Obviously, this echoes Leia's line "Help me, Obi-Wan Kenobi; you're my only hope" in A New Hope [35:35], but this whole episode is also an example of what she refers to at the beginning of her message:  "General Kenobi, years ago, you served my father in the Clone Wars..." [35:05].

17:04 - Trench: "And your friends on the planet below shall perish as a result of your failure."  This has some resemblance to what Palpatine says to Luke in Return of the Jedi:  "And your friends on the Endor moon will not survive" [1:44:25].

18:18 - Anakin:  "Well, no ship this small usually has a cloaking device."  Captain Needa has a similar line, referring to the Millennium Falcon, in The Empire Strikes Back:  "No ship that small has a cloaking device" [1:07:49].

The Clone Wars - S2E15 - "Senate Murders"

0:37 - An-other reuse of a shot originally from "Rookies" (S1E5) that copies a shot near the end of Attack of the Clones [2:13:51]:

1:55 - Padmé:  "'Exciting' isn't exactly the word I would use."  C-3PO has a similar line in Return of the Jedi:  "'Exciting' is hardly the word I would choose" [51:29].

4:17 - Padmé:  "Committing more troops to the front lines will not allow diplomacy to resume."  Padmé uses a similar phrase in Revenge of the Sith when she says to Anakin, "Now you're closer to the Chancellor than anyone.  Please, ask him to stop the fighting and let diplomacy resume." [41:55].

9:19 - Senator Organa:  "We should double our efforts on the vote."  Moff Jerjerrod also uses this expression in Return of the Jedi:  "We shall double our efforts" [4:38].

15:39 - Senator Organa:  "If we hurry, we might still be able to catch Deechi before he leaves the Senate."  Perhaps coincidentally, this bears some resemblance to C-3PO's ruse in A New Hope where he tells some stormtroopers:  "They're mad men!  They're heading for the prison level; if you hurry, you might catch them!" [1:22:27].

The Clone Wars - S2E14 - "Duchess of Mandalore"

0:18 - Narrator:  "A diplomatic mission!"  Like I mentioned two episodes ago, the phrase "diplomatic mission" occurs a couple times in A New Hope.  Captain Antilles tells Vader that "We're on a diplomatic mission" [5.55], and later Leia tells him, "I'm a member of the Imperial Senate on a diplomatic mission to Alderaan" [7:58].

3:30 - Deputy Minister Jerec:  "The actions by our government have taken us into a period of civil war."  (He says this in both the falsified recording and the unaltered one at 18:16.)  The phrase "a period of civil war" also appears in the opening crawl of A New Hope:  "It is a period of civil war."

4:59 - Satine (to Palpatine):  "You will turn our planet into a military target, which will bring the war to us."  Tarkin also uses the phrase "a military target" in A New Hope when he's talking to Leia:  "You would prefer another target?  A military target?  Then name the system!" [58:12].

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In both the episode trivia and the featurette for this episode on the Star Wars website, it's noted that the Coruscant plaza is based on a Ralph McQuarrie painting.

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The Clone Wars - S2E13 - "Voyage of Temptation"

0:18 - Narrator:  "Sent to investigate allegations that Mandalore was joining Count Dooku's Separatists, Obi-Wan was reunited with an old friend, the Duchess Satine of Kalevala."  Perhaps coincidentally, the phrase "old friend" is also used in Attack of the Clones (where Palpatine suggests "an old friend, like Master Kenobi" to protect Padmé [6:34] and Count Dooku calls Mace Windu "my old Jedi friend" [1:50:24] and just "old friend" [1:56:05]), in Revenge of the Sith (where Obi-Wan says, "Goodbye, old friend" to Anakin as he leaves for Utapau [51:13] and Yoda refers to Qui-Gon as "an old friend" [2:09:56]), in A New Hope (where Leia sarcastically says, "We, uh, ran into some old friends" when Han asks her and Luke where they've been [1:31:33]), in The Empire Strikes Back (where Yoda says that through the Force, Luke will see "Old friends long gone" [1:17:05]), and in Return of the Jedi (where Luke says, "I have a promise to keep to an old friend" [37:37] and Han calls C-3PO "an old friend of mine" [1:11:53]).

In the "Creating Mandalore" featurette on the DVD, Dave Filoni says that the design of Mandalore has a "Nordic flavor."  The name of Satine's home world is also one of these Nordic-inspired elements; Kalevala is the title of a Finnish epic poem.

10:34 - Anakin (to the clone troopers as assassin droids attack):  "Get behind me."  In A New Hope, Han Solo says this twice to Chewbacca as stormtroopers attack [1:17:12].

12:28 - Obi-Wan: "I sense it too."  Here, he's referring to the fact that one of the senators is a traitor, but he also says this in Attack of the Clones when he and Anakin perceive intruders in Padmé's room [14:08].

19:47 - There's a brief cue of the Imperial march as Anakin kills Tal Merrick*.

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*There's some discrepancy in how Merrick's name is spelt.  In the credits, it's Merrick, but on the Star Wars website, it's Merrik.