Anakin loses R2-D2 during a space battle and is assigned a replacement astromech droid, R3-S6. R2 isn't dead, of course, but he's fallen into the clutches of Trandoshan scavenger Gha Nachkt, who, after an encounter with Anakin and Ahsoka, on the hunt for R2, starts to wonder if this droid he found might be valuable. Anakin wants to search for R2, but is instead ordered by Obi-Wan to hunt for a hidden Separatist listening post.
Meanwhile, Anakin dislikes "Stubby" on sight and after some misadventures involving reactivated assassin droids and Anakin's starfighter being shut down is fuming over being assigned an incompetent astromech droid. And, on top of all that, R2 has never been memory-wiped and is thus carrying a treasure trove of Republic secrets . . .
- Asteroid Thicket: Justified. The ambush Anakin sets up for General Grievous involves a planetary ring, which are that dense in Real Life.
- Big Damn Heroes: Ahsoka and Rex arrive in the Twilight to save Anakin from two Separatist cruisers when he's having trouble with his starfighter.
- Captain Crash: Anakin loses a starfighter when he flies too close to an exploding Separatist ship and gets hit with a piece of shrapnel.
- Dilating Door: The airlock on Gha Nachkt's ship has one.
- Four-Fingered Hands: Unlike other Trandoshans, Gha Nachkt has these.
- Gasshole: Gha Nachkt makes his entrance climbing through the jammed door of an airlock and farting in Anakin and Ahsoka's faces, to their disgust.
- Malicious Misnaming: Anakin dislikes R3 on sight because he misses R2 and derisively dubs him "Stubby".
- The Millstone: R3 nearly gets Anakin killed repeatedly. It's because he's a Separatist spy.
- Nice Job Breaking It, Hero!: Anakin and Ahsoka unwittingly clue Gha Nachkt in to the fact that the R2 unit he picked up while hunting for salvage on the battlefield is more valuable than he thought.
- The Nicknamer: Anakin and Ahsoka both come up with nicknames for R3, "Stubby" and "Goldie" respectively.
- Off-Model: During the briefing at the beginning, when Anakin plays a hologram of an AT-TE, Rex's kama is missing. It happens again when it's revealed he's with the AT-TEs on the asteroids.
- Offscreen Moment of Awesome: We don't see exactly how Rex rescued Anakin from his damaged starfighter, especially as Anakin was knocked out and only woke up after the fact in the medical bay of the Resolute.
- Restraining Bolt: Gha Nachkt puts one on R2. However, R2, being the clever droid he is, manages to remove it.
- Screw This, I'm Outta Here!: After realizing that the command cruiser is too large to make a quick escape, Grievous ditches it and flees in his Starfighter.
- Thrown Out the Airlock: R2 does this to an assassin droid while sneaking around Gha Nachkt's ship.
- Tracking Device: R3, when ordered to activated the long-range scanners on Anakin's starfighter while he's flying a search grid, activates the tracking beacon instead. While this draws Grievous to his position, it also leads Ahsoka and Rex to assume Anakin's in trouble and come to the rescue.
- Unspoken Plan Guarantee: Anakin's plan to catch Grievous' fleet in a crossfire by placing AT-TEs on the asteroids of Bothawui's rings is not shown discussed beforehand, so it naturally goes flawlessly.
- What the Hell, Hero?: Obi-Wan is not happy with Anakin when he finds out about R2's lack of memory wipes.
- The X of Y: "Downfall of a Droid".