Chuck and Sarah spot Mary in Cell 13 and head that way. When Mary sees them, she tells Chuck he's about to get married and needs to get out of here. Chuck agrees, but says she's coming to. Mary can't leave, though, she says. She explains that Vivian's team has reassembled the Norseman down here and she can't leave without it. She'll just endure some torture and then find a way to break out and get it. Chuck and Sarah aren't going to allow that. Mary says that she knows the wedding is important, but so is the nation's safety, and if they take her now, Vivian will move the Norseman and the government will never get it. Sarah seethes at her not to be stubborn; they're only here to extract her, not to finish a failed mission. Mary's not thrilled with the words "failed" or "stubborn." Casey shows up then, and Chuck tells Sarah to stay here with his mom while he and Casey go get the Norseman. Sarah wants Casey to stay here with Mary, but Casey wants to go with Chuck. (Who died and put Chuck in charge anyway?)
As Chuck and Casey head to the Norseman, Casey tells Chuck it was an interesting choice to choose his mom over his fiancée. Chuck doesn't think that's what he did, but Casey reminds him that Sarah's the one he'll be sleeping with every night so to take her side. Back in the cell, Sarah and Mary bicker. Mary doesn't know why Chuck would come get her, but Sarah says he might not have if she weren't putting herself in harm's way. And now she's put everyone in danger two days before their wedding. Those five days since the guard sent them to Cell 24 sure did fly. Vivian and Riley, coming from a disgusting meal of some sort, notice the missing head guard and get suspicious.
Chuck and Casey are on some computers elsewhere, and Chuck figures out that Vivian's going to sell the Norseman, though he can't figure out where it is. Casey tells him they better get out of here "before your girls kill each other." Chuck hears that. Back at Mary's cell, though, Sarah's head is down as she pretends to be the real guard and lets Riley and Vivian into Mary's room. Riley tells Sarah there are to be no interruptions. Chuck and Casey head back toward Mary's cell. Chuck radios to tell Sarah that if Vivian turns up, she should keep her alive as they need to find out where the Norseman is. In the cell, Riley tells Mary he wants to see her dead and has been waiting for Vivian to be able to do it. He gives her the gun, but Mary tells her she knows she won't do it. Riley urges her on. And then Sarah comes in and pulls a gun on Riley and Vivian. Chuck comes in then and tells his mom it's time to go. Vivian can't believe the woman who betrayed her dad is the mother of the man who betrayed her. Except that she can. Chuck tells Vivian there's so much more she needs to know, but Vivian doesn't want to hear it. Casey says they should go before more guards come. They lock Vivian and Riley in Mary's cell and head out.