Chuck and Sarah's first assignment as a super-spy couple is... to observe an older couple's assignment. Sounds boring, right? Well, it mostly is, but thankfully the older couple being played by Swoosie Kurtz and Fred Willard makes it somewhat more enjoyable. Chuck and Sarah follow and observe on their mission to steal software from a German bad guy named Otto. They attend a party as his mansion, but Fred and Swoosie quickly get in a fight (he's a flirt, she's a drinker) and it devolves quickly into a spectacle. Sarah and Chuck take over and get the software -- off of a Bengal tiger's neck! -- only to have it stolen from them by Fred and Swoosie, who were faking the problems just to do this very thing. Then they run. Chuck and Sarah report back to Agent Redhead that her uber-CIA couple are traitors, but she can't believe it. She tasks Chuck and Sarah with finding them, which they do. They get them back to Chuck's apartment, with the software, when Otto and his tiger show up. Fred and Swoosie escape from their handcuffs and save Chuck and Sarah while Morgan -- who's been in training with Casey all episode to get to be part of the team -- proves his courage by running across the quad to lure the tiger away from Casey and into Awesome and Ellie's apartment. Chuck and Sarah ultimately help capture Otto and Fred and Swoosie. Then they defend them in front of Agent Redhead. And the veteran couple quits, passing the torch to this new amazing CIA couple. Casey graduates Morgan, even though he failed every test. Because it takes balls (and idiocy) take on a tiger. And the CIA needs nothing like it needs balls (and idiocy).
Meanwhile, Awesome and Ellie are in the Congo. Ellie's not loving it, so Awesome's sweet and helpful. They meet their Doctors Without Borders leader, who talks Ellie into liking it here, because it's worth it to help all of these people. Just when she's learning to be happy, Awesome gets sick and they head off for the airport. Their Doctors Without Borders leader, Justin, tells her he made it possible for them to easily clear Customs, so she thanks him, sorry they have to leave so soon. He tells her there's other ways to help back home, and Awesome will be fine. When she drives away, he pulls out a Ring phone and calls someone to say that he "made it look like malaria" and Ellie doesn't suspect a thing. Uh-oh. They can't hurt Awesome. On the plus side, it looks like Ellie and Awesome's trip to Africa wasn't a way to write them off the show.
Instead of a few things Chuck wants us to know, Morgan introduces us to his boss, Chuck, and his girlfriend, via Hart to Hart-style fake opening credits (thanks to Trini Girl for pointing out what show that was; I was stumped). Then we get a zoom-in on Morgan's eye (think Lost gimmick), as he wakes up from his dream about Chuck and Sarah. When he heads to the kitchen for a midnight snack, he thinks Chuck's there, but it's Sarah in a skimpy nightie. She offers Morgan orange juice, but he starts in about "vitamin Cs," "vitamin Ds" and "jugs," so she walks off. Next morning, Chuck comes out all smiley, and Morgan finds his happiness insulting to the people in the house who aren't having sex. And he'd like Sarah to wear more clothes, since he has started wearing pajamas on her account even though he likes to sleep in the nude. Chuck says to expect her there more since he's going to ask her to move in. She's standing behind him, so Morgan leaves them alone to talk about it. She wonders why they'd move in together, and doesn't want to mess with a good thing. Plus, they're not a normal couple. She opens the couch and grabs a gun. Chuck scolds her for having guns in his house, but she tells him about the 30-foot rule: No agent should be without a weapon. He says the Bartowski rule is "No guns in my apartment." She says not if he wants to live with a spy.
Cut to the Congo, where Ellie and Awesome are arriving at a new clinic. She's leaving a message on Chuck's phone until Awesome tells her they're there and she gets off. They get out in the rain, and Ellie's stressed about the men walking around with guns and the not showering or sleeping. Awesome reminds her it's the toughest job you'll ever love, and offers to make her dinner under the stars that night. They kiss, all happy.
Back at Castle, Chuck and Sarah are getting their mission, which is to observe spy power couple the Turners. No one knows who they are until General Redhead gives code names, some of which ring bells for Casey and Sarah. In other words: They're legends. General Redhead says that, since Chuck and Sarah insist on being a couple, she wants them to see how it's done since the Turners have been married for thirty years, "more or less." Casey's assignment is to get Morgan field-ready. He doesn't want to, but General Redhead tells him he's a diamond in the "very, very rough," and she's sure he can make him sparkle. Casey grunts.