Episode two opens with the quick demise of a man running through the jungle, killed for a gold-colored briefcase by a vicious-looking Australian. Fast-switch to Sarah and Carina (a fellow spy from earlier episodes), unwinding at a club. Carina is pressing Sarah, and she’s trying hard not to talk about Chuck. Another fast switch to Chuck and Morgan in his newly-vacated apartment; they decide to troll for women and end up (inexplicably?) at the same club as Sarah and Carina. Carina takes advantage of the opportunity to introduce Sarah and Chuck to her fiancee Karl — the baddie who killed the guy for the gold briefcase in the first scene. Chuck flashes and tries to warn Carina. She laughs him off. She already knows he’s an arms dealer, and welcomes Chuck and Sarah to their new mission.
Big Mike greets the crew back at Buy More, where Morgan presses Chuck for information on the guy Carina was with. Carina herself appears and summons Chuck to Castle for a briefing on her engagement party. Morgan and the Buy More gang plan a housewarming party at the new bachelor pad. Next we see Morgan assisting Chuck in prepping for the party, and alternately, Carina and Sarah preparing, with some girl talk about Chuck.
The party begins and Chuck, again awash in emotion, tries at the first opportunity to “talk to” Sarah about their relationship, distracting Sarah from the mission, and annoying Carina; she verbally slaps him back into focus by telling him Sarah is acting this way because she loves him and he needs to “go be a spy” (read: cowboy up).
Chuck catches up to Sarah and she, too, reminds him to focus on the mission. Carina gets the key, hands it off to Sarah, and as Karl toasts the engagement Sarah and Chuck make their way to the vault. Karl runs short and Casey, portraying Carina’s uncle, has to fill in and stall while Chuck flashes Cirque du Soleil and flits around the swirling laser beams in the vault to recover the weapon in the gold briefcase. He succeeds, only to break the beam as he walks out. The vault slams shut between them and some sort of gas begins spraying in. Two thugs respond to the alarm and hear Chuck’s confession, with great amusement, while Sarah stealthily shuts off the gas from the vent over their heads. As soon as one keys in his code to open the vault she swings down from the vent and beats them down, just in time to catch Chuck as he falls out with a breathy, “I love you.”
Back at Castle, Casey asks the general what the weapon is; it’s “above [his] paygrade” — and, from the sound of it, the general’s too. The group is told they “never saw the weapon” and Chuck regains consciousness in time to hear Sarah tell the General someone else should handle him. She says no and Sarah, realizing Chuck heard the exchange, tells him to come train, and takes a staff to him. He refuses to flash because he says he doesn’t want to hurt her; she responds miserably, “You can’t” as she knocks him to the floor. Meaning, apparently, “can’t more than you already have.” Carina, desperate now because she suspects Karl knows something, shows up at the Buy More and hands off the weapon to Morgan, making him promise to give it to Chuck as Karl and his thugs close in on her. Morgan is still in puppy mode, thinking she’s a Swedish model. Back in the SUV Karl confronts Carina. She defends her cover, only to be faced with an in-vault recording of Chuck’s monologue to Sarah which in part protested that he wasn’t a “cold-hearted spy like Carina”. She’s not happy. Karl, barely controlling his rage at her deceit, shows her the flyer for the housewarming party and promises to kill him on her behalf, with her next on the list.
At the housewarming party, the guys are excited to tell Morgan his girl showed up… not so excited that she is flanked by Karl and three goons. Morgan calls Chuck in confusion and frustration, who warns him not to approach. His friends don’t get the warning and try to intervene, getting drugged when they take drinks Carina slipped a little something into from her engagement ring. Morgan is furious, giving her a piece of his mind, and the case, and telling her to give it to Chuck herself. The intervention now must begin. Casey, as the unhappy neighbor, breaks out the garden hose so the guests will flee. As Karl and Carina head out the Castle crew turn the tables with exploding alcohol leaving only Kurt, but with a gun to Carina’s head. He declares he’s going to kill her because she broke his heart. Chuck sees a way in and yells, “Wait! I get it, okay?” and proceeds to call out Karl on his feelings; the camera shows Sarah in the foreground, face contorted in barely-controlled anguish at Chuck’s empathic declarations. But he strikes the main chord when he says Carina had to bury her feelings but still loves him. Carina plays along, distracting him, for the moment it takes to drop him. “Yeah, right, stupid,” Carina mutters in disgust at her fallen fiancee.
Back at Castle Chuck paces as Casey and Sarah fill out paperwork. The general appears on the screen just as Chuck is about to open the gold case, stopping him. A little later Chuck and Sarah, in the courtyard, smooth things over for the next episode as Chuck cleans up from the party. As she departs, he yells for Morgan to come help him, saying “I’m all alone here — it had better have been worth it!”
Morgan’s feet appear at the end of his Star-Wars-sheet-clad bed. Then a woman’s feet appear alongside: Carina’s. She speaks kindly enough to Morgan about his abilities to reassure the viewers that she is capable of emotion. Morgan asks why she slept with him (he knows he’s out of his league). She cites the fact that he told her off earlier. She appreciated that he had broken her spell. Carina and Sarah part company at Castle in the last scene, and she slides a USB drive across the desk to Sarah – Chuck’s monologue from inside the vault. Sarah’s eyes mist over as she watches, and the camera goes dark.
