Rebels - S2E20 - "The Mystery of Chopper Base"

8:57 - Kanan (to the rest of the rebels as they enter a cave):  "Stay sharp, and stick together."  In A New Hope, Han Solo says, "Stay sharp" twice, once to Chewbacca before making the jump to hyperspace away from Tatooine [56:08] and once to Luke shortly before the Death Star's sentry ships attack [1:34:15].

10:04 - Ezra (to Kanan, before he tries to connect to one of the spiders):  "Trust me; I got this."  Han also says, "Trust me" (to Leia) in The Empire Strikes Back [1:20:06].

13:21 -  Kanan:  "Maybe this base isn't so perfect after all."

Hera:  "I'm not giving up without a fight.  Hang on!"

Zeb:  "Hera, get us outta here."

Hera:  "Ugh, it's no good.  I'm at full power.  Ah, they must have glued us down."

Han makes similar comments to Luke in A New Hope, when the Millennium Falcon is caught in the Death Star's tractor beam:  "There's nothin' I can do about it, kid; I'm at full power.  I'm gonna have to shut down, but they're not gonna get me without a fight." [1:04:57].  Earlier, he also says, "Chewie, get us outta here!" [55:26].

16:05 - Zeb (to Ezra):  "OK, kid, quick:  what's the plan?"  In A New Hope, Han asks Luke almost the same thing:  "What's your plan?" [1:11:56]

18:09 - Kanan (to Hera):  "Get us outta here."  See above, 13:21.

19:45 - Kanan (to Hera):  "We'll see each other again; I promise."  In The Phantom Menace, Obi-Wan tells Anakin, "You will be a Jedi, I promise" [2:07:43], and in Revenge of the Sith, Padmé tells Anakin, "I'm not gonna die in childbirth, Ani, I promise you," and he replies, "No, I promise you" [53:46].

21:03 - Ahsoka (to Ezra):  "In my experience, just when you think you understand the Force, you find out how little you actually know."  In A New Hope, Obi-Wan also uses this expression:  "In my experience, there's no such thing as luck" [1:02:17].

Rebels - S2E19 - "The Forgotten Droid"

5:24 - The symbol on the door inside the Imperial ship also appears in Echo Base in The Empire Strikes Back [33:36]:

5:54 - AP-5:  "It is against my programming protocol to allow this Imperial vessel or its cargo to be late for its scheduled deliveries."  C-3PO encounters a similar limit in Return of the Jedi, as he tells Han:  "It's against my programming to impersonate a deity" [1:11:37].

6:18 - Stormtrooper (to Imperial captain):  "Sir, we've begun a search.  If any rebels got on board, we'll find them."  In The Phantom Menace, a battle droid's comment has a similar construction; referring to the Jedi, it tells Nute Gunray and Rune Haako, "If they're down here, sir, we'll find them" [10:39].

8:12 - AP-5 (to Chopper):  "You can run, but there will be no escape."  Vader says nearly the same thing to Luke in The Empire Strikes Back:  "There is no escape" [1:50:25].  Palpatine also tells Luke, "There is no escape" in Return of the Jedi [1:44:31].

11:36 - Imperial captain (after Chopper hits him):  "Ow!  What the?"  In Attack of the Clones, an alien on Coruscant also exclaims, "What the?" 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].

12:05 - AP-5 (to Chopper after he attacks the captain):  "I can't believe what you just did."  Dr. Jones, Sr. also says this in The Last Crusade after Indy shoots down some Nazis:  "I can't believe what you did" [51:29].

16:30 - Ketsu (after Sabine thanks her):  "You owe me one."  Anakin also says this to Obi-Wan in Revenge of the Sith:  "Alright, but you owe me one, and not for saving your skin for the tenth time" [24:38].  In Return of the Jedi, Han also tells Luke, "I owe you one" [37:21].

16:47 - Screenshots don't do this justice, but this shot of The Ghost sliding to a stop as it approaches the camera is similar to one of the Separatist vessel doing the same near the beginning of Revenge of the Sith [23:23].

Rebels - S2E18 - "Shroud of Darkness"

2:04 - Kanan (to Ezra, as they're running to the edge of a cliff):  "I don't like this."  This is also Leia's reaction after the Millennium Falcon lands in Cloud City in The Empire Strikes Back [1:19:58].

5:14 - Ahsoka (talking about the Jedi):  "One by one, they were hunted down."

Ezra:  "By the Inquisitors."

Ahsoka:  "Or worse."

There are similarities here to two lines in A New Hope.  Obi-Wan tells Luke that Vader "helped the Empire hunt down and destroy the Jedi knights" [34:19].  A bit earlier, after C-3PO translates R2-D2's announcement of approaching creatures, Luke guesses that they're "Sandpeople.  Or worse." [28:35]

13:34 - Kanan (to Temple Guard):  "I learned enough."  Luke makes a similar comment in The Empire Strikes Back after Vader says that Obi-Wan never told him what happened to his father:  "He told me enough!" [1:51:02].

Rebels - S2E17 - "The Honorable Ones"

1:30 - Zeb:  "My gut tells me this is a trap."  Admiral Ackbar says, "It's a trap!" in Return of the Jedi [1:35:03], and Leia says it twice in The Empire Strikes Back [1:39:50].

2:27 - Ezra (as Chopper fights an-other droid):  "Come on, Chop; get him!"  In Attack of the Clones, Boba Fett similarly encourages Jango to shoot down Obi-Wan:  "Get him, dad; get him!" [1:08:17].

3:27 - The framing of the escape pod launch is basically the same as that in A New Hope, with the camera looking straight on [7:02]: