The Clone Wars - S6E3 - "Fugitive"

Throughout "Fugitive," AZ-3's mouth lights up when he's speaking, so in other words, a lit mouth is an open mouth.

After Fives becomes convinced that, like Tup, there's a chip inside his own head, he tells AZ, "You have to take it out."  AZ is hesitant and tells Fives that it's a "dangerous surgery" and "you may die," but Fives replies, "It's a chance I have to take.  I trust you."  Before finally agreeing, AZ's mouth lights up without his saying anything and stays lit for a few seconds.  This is the droid equivalent of his mouth hanging open in surprise.

The Clone Wars - S6E3 - "Fugitive"

0:40 - Narrator:  "Now the tumor is the only hope to finding answers for Tup's mysterious illness."  Leia uses the phrase "only hope" twice in A New Hope ("Help me, Obi-Wan Kenobi; you're my only hope" [35:35] and "You must use the information in this R2 unit to help plan the attack; it's our only hope" [1:38:49]); C-3PO uses it once in The Empire Strikes Back ("Your highness, we must take this last transport; it's our only hope" [31:49]); Obi-Wan uses it once, referring to Luke, in Return of the Jedi ("You were our only hope" [47:24]); and Luke uses it once, referring to Leia, in Return of the Jedi ("If I don't make it back, you're the only hope for the Alliance" [1:19:39]). Sio Bibble also uses it in The Phantom Menace: "Our only hope is for the senate to side with us" [23:48].

4:02 - AZ-3 (after Fives attacks a group of clone troopers):  "Look what you did!  I cannot believe what you did!"  In Indiana Jones and the Last Crusade, Dr. Jones, Sr. says almost exactly the same thing after Indiana Jones shoots a group of Nazis:  "Look what you did!  I can't believe what you did!" [51:26]

5:47 - Shaak Ti (to a clone trooper, referring to Fives):  "I want him brought in alive.  Have that ship tracked."  This is somewhat similar to Vader's commands to the stormtroopers in A New Hope ("Bring me the passengers; I want them alive!" [6:08]) and to the bounty hunters in The Empire Strikes Back ("You are free to use any methods necessary, but I want them alive, no disintegrations" [1:06:14]), and while the specific dialogue isn't very similar, Captain Needa gives the same command in The Empire Strikes Back, referring to the crew of the Millennium Falcon:  "Track them!" [1:07:42]

6:52 - Fives (to AZ-3, after he turns into a sort of speeder):  "You're just full of surprises, aren't ya?"  Luke uses the same expression during his duel with Vader in The Empire Strikes Back:  "You'll find I'm full of surprises" [1:43:49].

14:19 - Nala Se (referring to Fives and AZ-3):  "They must have escaped by now."

Shaak Ti:  "Escape was never their intention."

There are similarities to two lines in A New Hope here.  Referring to Obi-Wan, Tarkin says, "Surely he must be dead by now" [1:16:31], and later in the same conversation, Vader says, "Escape is not his plan" [1:16:59].

19:22 - Nala Se (to Shaak Ti, referring to Fives):  "Master Jedi, we must terminate this trooper immediately."  Referring to Leia, Tarkin gives the same command in A New Hope:  "Terminate her immediately" [1:03:05].  In Return of the Jedi, C-3PO, translating for Jabba the Hutt, also uses this expression:  "His high exaltedness, the great Jabba the Hutt has decreed that you are to be terminated immediately" [28:48].

20:08 - Shaak Ti (after Nala Se insists on going to Coruscant):  "As you wish, Doctor."  The phrase "As you wish" occurs a number of times in the original trilogy:  in A New Hope, Vader says it after Tarkin asks him to release General Motti from his Force choke [38:45]; in The Empire Strikes Back, Boba Fett says it after Vader warns the bounty hunters against disintegrations [1:06:22]; in Return of the Jedi, Vader says it twice more in conversations with the Emperor [39:16 and 1:07:38], and Admiral Piett says it to Vader ("As you wish, my lord") [56:13].  In The Phantom Menace, Nute Gunray says, "As you wish" at the end of a conversation with Darth Sidious [5:04], and in Revenge of the Sith, Captain Typho says, "As you wish, my lady," to Padmé [1:41:23].