The Clone Wars - S2E15 - "Senate Murders"

The climactic scene of "Senate Murders" features some significant lighting.

Lieutenant Divo suspects Senator Burtoni for the murders of Senator Farr and Senator Deechi, partially because the poison that killed Farr was developed by Kaminoans and Burtoni is a Kaminoan.  When Divo mentions that the poison affects only Rodians, however, Senator Amidala notes an inconsistency:  if the poison affects Rodians and the senatorial party all drank the poisoned drinks, Lolo would have been poisoned too.  As Amidala is considering this, Lolo is standing behind her, covered by her shadow:

As Amidala remembers that Lolo didn't drink, Lolo steps out from behind her, pulls a blaster on Amidala, and admits to the murders:

Lolo's standing in the shadow here represents two things.  On a simple level, it shows that she's trying to avoid the scrutiny of the investigation, but, more metaphorically, it also illustrates that her involvement has been obscured while Divo has been conducting his investigation and Amidala and Senator Organa have been doing their own.  None of them considered Lolo as a suspect until this moment, and when she steps out into the light, she reveals everything.  The shadow she's hiding in represents the characters' ignorance.

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].