Alex and Casey are having dinner at his place. She's insisting they have dinner on graduation day, but he says they can do it the day after. He doesn't want her lying to her mother on his behalf. She says lying to her goes with the territory, but he says it's not fair for her to be caught in the middle of her parents. She doesn't mind being in the middle as long as she gets to have him in her life. He says he minds. He respects that she doesn't want to tell, but they have to come up with a compromise, because he can't be there on the day of graduation. She says, "Unless..." And he says they'd have to tell her mom the truth. She says she's ready to, but also scared.
At Chuck and Sarah's, she tears up the prenup, asks for him to forgive her for ever presenting it, and asks if he'll stop being so cool. He pulls out an envelope that says "Prenup" on it. Sarah says that's so not cool, but he asks her to read it. She reads the first part, "I, Sarah Walker, promise to always love Chuck Bartowski. In return he will always love me." He finishes it: "I promise Chuck that I will never even contemplate the word divorce, and I will never use my prenup." He says he already signed it. She signs it, too, and giggles. Then they drink wine, but he notices Ellie and Awesome coming home then. Chuck says he has to talk to Ellie right now before he loses his nerve. She agrees he needs to go tell her now.
Ellie comes out into the courtyard to talk to Chuck, since Awesome's putting Clara down. She asks what that look on his face is about. Chuck says he heard she's been kind of busy lately, and she laughs that a newborn will do that to you. She asks if there's something pressing going on, because she needs to make dinner. He asks her about their dad's computer. And, see, this is the moment where she should realize that her mom's been talking to Chuck, so he'd obviously know what's up. But if anything is in the Bartowski DNA, it's lies and secrecy, so she tells him she thought she'd uncovered some secret files on the computer, but it turned out to be cheats on some video game he was developing. "Just gibberish, really." Chuck: "Oh yeah?" She tells him dinner's not going to cook itself, so she heads back in. Sarah comes out, and Chuck tells her his sister just lied to him, which she never does. "Not cool."
Volkoff Industries. Vivian's on the phone telling someone there was only one person her father was ever threatened by. He went by the name of Agent X. She's going to track him down and kill him. Then no one can touch her. Ever. We see her little horse statue and then the vault it opened the first time she was in this office, which now contains the thorium.