It’s the year 2000. Devon and Elly are skipping a pre-med class to engage in …private study… in a broom closet. Nine years later she’s looking for a broom as they unpack in their new apartment. She’s tired, and whimpering that their wedding already seems like it was an eternity away. Devon comforts her by telling her to stop unpacking. As they begin to cuddle up, a helicopter outside distracts them. The camera moves to Chuck’s bedroom. He enters in a drop harness, to be startled by Awesome, who’s waiting for him. He tries to pry some information about the mission from Chuck, and lets on he is loving his impression of Chuck’s spy life. Chuck hightails it over to the new apartment to help Elly where he was supposed to have already been, but flashes on the first guy to appear on the news as he he gets the TV hooked up. The premier of Costa Gravas has been taken to the hospital after collapsing from an apparent heart attack. Chuck’s cell phone rings and he has to take off. Devon’s cell phone, likewise, and Elly is left alone and exhausted.
The premier, it turns out, has to be protected while being treated at – wait for it – Westview Medical, which is why Awesome was called at the same time Chuck was. The general orders Chuck to utilize his relationship with Devon to acquire the premier’s medical information so they’ll be able to determine whether there was an attempt on his life or a legitimate medical emergency. Casey protests the whole assignment, because as it turns out, he has been sent three times to assassinate the premier and was unsuccessful in spite of the bedlam he otherwise caused in the country. But things are different now, the general tells him.
After the (real world) commercial break, the Castle crew stands in front of the television with their arms crossed as the medical team tells about the premier’s astounding release from the hospital before they could make it out Castle’s door. Chuck meets Devon in the courtyard and Awesome tells him the premier did not have a heart attack but was poisoned, then asks if he might be able to work for the CIA. Chuck rebuffs him with the assertion that his sister would kill him, but he did good by telling him about the poison.
Back in Casey’s apartment the general tells them they must get into the embassy to protect the premier, but remain incognito. Casey can’t go, because he’s persona non grata in Costa Gravas. Chuck laughs at Casey’s assertion that the premier personally calls him “el Angel de la Muerte” — the Angel of Death. They then hear guys speaking loud Spanish outside. Armed men wearing fatigues and carrying weapons in the courtyard, and Casey looks like he’s seriously going to wet his pants as he starts grabbing weapons. Inexplicably it is Chuck who works overhard to calm Casey and Sarah as they work their way around to — Awesome and Elly’s apartment. It turns out after some tense moments that the premier wanted to personally thank him for saving his life, and to invite them to a banquet at the embassy. Elly’s quite excited. Chuck, not so much.
Chuck brings Sarah as his date. She has to remind him again to be calm, and to focus for the Intersect’s sake. They look around; Devon wants to know what his part in the mission is and Chuck impatiently tells him it’s to keep Elly out of danger… just in time to see the premier, kissing her hand and speaking to her in a most romantic fashion. Chuck keeps Awesome from breaking in on them long enough for Sarah to rescue her. The guys and girls pair off to talk about Sarah and Chuck’s relationship. Sarah and Chuck work hard at trying to convince Elly and Devon, respectively, that there’s no more magic between them (as everyone watching in TVland wishes them good luck with that). Casey interrupts over the com as the premier goes under the spotlight to make a speech, which culminates in an invitation to Elly for a dance which she, of course, may not refuse. He proceeds to manhandle her shamefully as Casey, Sarah and Chuck locate and target the assassin, requiring Chuck to download the necessary dance moves from the Intersect to allow them to move toward him. Devon remains on the sidelines, increasingly spastic at the treatment of his wife. Casey’s assassin turns out to be a mere protester with a rotten egg, but not until after Chuck knocks him unconscious. The guards, thinking Chuck and Sarah are inebriated, grab and escort them out. On the way he flashes on one of the guards, who is the real assassin. Casey is forced to intervene because Chuck and Sarah can’t get back into the embassy. Awesome sees the disguised Casey draw his gun, sprints across the room and tackles him, allowing the assassin to resume his guard disguise and causing the arrest of Casey. “El angel de la muerte,” gasps the premier, as Casey is unmasked. Awesome is stunned as the realization of what he has done sinks in, while the premier thanks him in amazement for saving his life yet again.
The general won’t help the effort to get Casey back, except through diplomatic channels, because of the need to foster good relations with Costa Gravas. The premier begins his interrogation; Casey tries, to no avail, to explain the situation. The assassin is in the room still masquerading as a guard which doesn’t help. He gags Casey, and hands the premier a cigar. Casey kicks it out of his mouth but can’t explain why, since he’s still gagged and tied to a chair. The premier lights up and passes out after one drag. Elly and Devon have made their way home and are looking forward to finishing the evening alone, when the consulate calls. Elly rolls her eyes and Devon takes off, grabbing Chuck on the way. They stop by Castle to get blueprints of the embassy, Sarah catches them and Chuck and Awesome tell her the situation just as she’s about to rush off to attempt a rescue on her own.
Devon is allowed inside the consulate, with Chuck and Sarah in nurse disguises, and the head guard reiterates to him what will happen if the premier dies. The assassin reenters Casey’s cell in the basement and tells Casey he’s going to kill him. Casey reverse-interrogates the assassin as he monologues and finds out he works for the Ring, which wants to preserve bad relations between Costa Bravas and the U.S. Back and forth, Awesome works on the premier while the assassin talks smack to Casey. Sarah finally takes out the guards and Casey takes out the assassin, getting shot and nearly poisoned in the process. The three reunite and attempt to escape but Awesome won’t leave the premier dying. Chuck convinces the guards to not kill them outright, but the lead guard tells the squeamish-on-a-good-day Chuck he has to prove he’s not an assassin — by doctoring Casey’s wounds. Chuck starts to freak out but Awesome talks him down. In his more relaxed state Chuck flashes the medical know-how out of the Intersect that he needs to save Casey. The premier, however, is not out of danger. He needs a transfusion and the only one with the same blood type is — wait for it — Casey! He objects venomously, but only until Chuck shoves his face in the anesthesia mask.
Casey wakes up at Castle just in time for the congratulatory call from the general. He remembers how the premier was saved and everyone gears up for the conflagration. Sarah hands him a gift of cigars with a handwritten note thanking the “angel of life” for his extraordinary gift: the blood of a great patriot flowing in his veins. Disaster averted. Chuck leaves through the yogurt store and is greeted by Awesome who says he’s scratched his “espionage itch”. He doesn’t want to give up half his life, he says, to live the requisite double life of a spy. He checks out for the hospital as Sarah shows up. She and Chuck discuss how they can be “just friends” as their cover has further complicated their relationship. Or vice versa, it’s kind of hard to tell.
Devon, back at the hospital, talks to Elly on the phone and promises after his final patient they will sink, finally, into one another’s arms. He enters the treatment room to be greeted by the assassin who had been trying to kill the premier. Buh-bye.
Chuck opens the door of his apartment to find Sarah there, not looking well at all. She puts her arms around his neck and whispers the sad news in his ear as Elly comes around the corner asking if they have seen her husband. The pain in Sarah’s face, and the shock on Chuck’s, are all we see as this two-day, three-episode roller coaster comes to a halt.
