A series of dead couriers and an art exhibition provide a lead to an elusive arms dealer, La Cuidad. With no photo to go on, Chuck finds himself on his first mission to identify the dealer and find whatever he's selling. Meanwhile, his regular life is under pressure too as Big Mike sets a challenge for the Assistant Manager position; clear through the backlog of old computers awaiting repair.
At the art exhibition, Chuck and Sarah quickly identify a suspicious guest. Left on his own while Chuck and Sarah deal with the suspect.
- **FLASH**
Chuck realises the painting has a weapon hidden in the frame. Immediately after, he meets an attractive woman...
- **FLASH**
...La Cuidad herself.
Meanwhile, an accident with the backlog repair sees Morgan trapped in the computer storage cage. With Chuck holding the only key, Morgan calls the hotel looking for him, accidentally giving him away to La Cuidad. She and her goons kidnap him to her room. Sarah and Casey learn that their suspect is an MI6 agent after La Cuidad. Realising the real criminal is still at large in the function where Chuck is alone, they hurry back, only to narrowly miss him.
Meanwhile, Chuck is tied to a chair in La Cuidad's room, threatened with torture unless he tells her who he is and who he works for. He's able to convince her that he's just a computer repair guy who sneaked into the party to impress a girl, but as he's seen her she decides he still has to die. Fortunately, Sarah and Casey track Chuck's watch and mount a rescue. La Cuidad flees the scene, but still intends to kill Chuck.
Trope Flash:
- Arms Dealer: The team is after a particularly elusive international arms dealer who's only known as La Ciudad, with nobody knowing what she looks like or her gender. (Despite 'La' being a feminine pronoun}.
- Boredom Montage: When Morgan gets locked in the storage cage there's a brief montage of him in various sleeping positions and doing yoga.
- Cat Fight: Sarah gets into one with La Ciudad.
- Chekhov's Skill: Chuck learning to Tango wasn't for nothing.
- Cold Sniper: La Ciudad's plan to kill Chuck is by having her henchmen scare him away from the Buy More while she kills him in cold blood with a sniper rifle from a nearby roof.
- Designated Girl Fight: Sarah ends up fighting the female villainess while Chuck and Casey deal with her male henchmen.
- Failed a Spot Check: Chuck has tango lessons from Awesome, with Ellie watching. None of the three notice he's learning the woman's side.
- Femme Fatale: When La Ciudad (still in disguise) intuits that Chuck is too interested in the painting she's secretly trafficking, she invites him to a dance, and uses her feminine wiles to get him to tell her what he knows.
- My Friends... and Zoidberg: Lampshaded:Chuck: Sorry about this guys, and Anna. We really need to find a non-gender-specific name. How about "team"?
Anna: Fellow Nerd Herders?
Lester: "The Lesters".
Jeff: "Chuck's Stable of Hos". - Good Scars, Evil Scars: La Ciudad has a nasty one on her neck that Chuck flashes on to identify her. It later tips Sarah off as well.
- High-Altitude Interrogation: When he's being interrogated by La Ciudad, one of her henchmen picks up the chair he's tied to and threatens to throw him off the balcony.
- I Can't Dance: Chuck is nervous about the ball because he can't dance, so he starts taking Tango lessons from Awesome. But even when he succeeds, when he goes dancing he finds out he only learned the woman's part, forcing La Ciudad to lead when they dance
- Near-Miss Groin Attack: Chuck is taken prisoner by an arms dealer called La Cuidad and tied to a chair in her hotel room. When she asks his name, he gives his cover name of Charles Carmichael. In response, she throws a knife at the seat where it narrowly misses his crotch. Terrified, he blurts out "Chuck Bartowski!"
- Shout-Out: Chuck says he thinks the painting has a Bob Rossian feel to it.
- Samus Is a Girl: The arms dealer La Ciudad is the beautiful woman Chuck starts dancing with. Though this is obvious to anyone with even a basic knowledge of Spanish; "La" is a feminine pronoun.
- Troll: Casey tells Chuck he needs to know the tango for the mission. He doesn't, but ends up dancing it anyway, with a woman who turns out to be the Arms Dealer they're looking for.
- Tuxedo and Martini: What the episode invokes, due to the team having to go undercover to a fancy ball in order to look for La Ciudad.
- Villain of the Week: The Arms Dealer La Cuidad (Lorena Bernal) that the team is after, who comes to the Buy More to kill Chuck when she believes he's a danger to her.
- You Have Outlived Your Usefulness: Each of the couriers are killed after delivering the painting.
