When Anakin and Obi-Wan's forces are ambushed during a battle to liberate the planet of Christophsis from a Separatist siege, the two Jedi discover evidence of a traitor within the Republic ranks. While Anakin and Obi-Wan, suspecting the Sith, head off to Separatist headquarters and confront the assassin Asajj Ventress, back at base, Cody and Rex begin to suspect that the traitor is among them.
- Air-Vent Passageway: Slick hides in the air vents to try and escape. Rex and Cody aren't fooled, though.
- Anachronic Order: This episode takes place between "Cat and Mouse" (2:16) and the pilot movie.
- Batman Gambit: Cody and Rex figure out Slick's escape plan. Knowing that Slick is hiding in an air vent, they lure him into their trap.
- Call-Forward: Did you ever wonder why the Republic forces don't have any tanks or gunships in the pilot movie's opening battle? It's because Slick blew them up the night before.
- The Cameo: General Loathsom (who appears in the pilot movie) appears briefly.
- Hypocrite: Slick claims his actions are to free his fellow clone troopers from what is slavery in all but name, yet his actions cause the deaths of more clone troopers than would have happened otherwise. Rex and Cody call him out on this at the end.
- I Never Said It Was Poison: Slick is found out when he inadvertently reveals that the Jedi are gone, even though there is no way that he should know that.
- In the Hood: Ventress when she first appears.
- It Works Better with Bullets: Cody leaves a blaster on a table. Slick grabs it, only for Cody to reveal it's unloaded.
- The Mole: Slick is a traitor to the Republic.
- Moral Dissonance: Slick's main motivation; the Republic's vaunted stand for "freedom" is being fought mostly by clones who are slaves in all but name.
- Off with His Head!: One of the clone troopers rips the head off the tactical droid leading the assault at the beginning of the episode so they can get information on how the Separatists knew about the planned ambush.
- Stuff Blowing Up: Slick blows up all of the tanks and gunships as well as the weapons depot, with only four heavy cannons surviving.
- Zerg Rush: The B1 battle droids overrun the positions of Anakin, Obi-Wan, and the clone troopers at the beginning of the episode with a surprise attack and overwhelming numbers, wiping out most of the Republic force. This episode chronologically marks the first time that the B1 battle droids have been presented as a serious threat in The Clone Wars instead of being comic relief fodder.