Castle. General Redhead is lecturing Chuck and Sarah again about their unprofessional and unacceptable behavior regarding the wedding planner. They both apologize, and Chuck swears never to fake a flash again. She adds that her superiors are quite impressed, however, that they obtained the Zephyr device (which I guess was on the father of the bride). Though she does wonder how they accomplished that without any CIA resources. They start to explain, but she doesn't want to know. She welcomes them back, and then dismisses them. She shuts down, and they agree that went better than expected.
Later, Gary Cole's packing up at Chuck and Sarah's. Chuck asks if he's leaving already, and he is because he's going to pull a con on some Alabama company looking into orange futures. Chuck hopes he'll stay until Sarah's home, but Gary Cole says they've never been great at goodbyes. So Chuck tries again, saying he knows Sarah would never say it, but it would mean the world to her if he'd come to their wedding and walk her down the aisle. Gary Cole says Chuck should follow Sarah's lead, since she knows him very well. He says he wishes them both the best, but won't be able to make the wedding. Chuck asks what he means; he's her dad. Gary Cole says he's always been a better con man than a father, and he told himself he wouldn't make any promises to Sarah that he can't keep. "She's had her heart broken too many times by me. I just don't want to do it again." Chuck asks him to at least stay for dinner, and Gary Cole relents with a sigh.
Kath's at Casey's. He apologizes, and says this is all his fault. She says she just never thought she'd see him again. He's rubbing his second finger over his first, and Kath says Alex does that, too, when she's nervous. Casey says he never noticed. Then she says this will be easier for Alex, now that she knows. Casey says he didn't just do it for her. Kath breathes deeply and says, "Look at you. You're a soldier. You're a hero. You have everything you've ever wanted." Casey doesn't say anything, but we all know what he's thinking (and a lesser show would have gone ahead and said it, right?).
Sarah's in the kitchen, making a drink, when Chuck comes home with groceries. He tells her that a courthouse wedding sounds romantic, "or at least within our new budget." He says he got all the ingredients for dinner with her dad; where is he? Sarah says he's gone, so Chuck asks if he told Sarah. She says he didn't have to. This is what he does: He leaves. "Once you know all the cons, you can never be a sucker." They smile at each other sweetly and a little sadly, and hug. Which is when we cut back to the past, with Gary Cole returning Sarah to her grandma's. She's asleep in the car, and he picks her up and carries her inside and puts her to bed without waking her. He keeps the piggy bank, though. He gives her a "See you later, alligator."