For about two seconds, when she says she can't fake this with him anymore. He assumes she means she's been faking all the orgasms, but no worries, Chuckles, those were real. She's talking about finding the Basque terrorist. They quickly figure out what we know (and I just weecapped): They both know everything. They get all hot and bothered about how sexy it is to talk about terrorists, and then decide it would be criminal to turn their backs on this "one last mission." Then they make out. Because, you know, evil terrorists can wait.
Castle. Morgan and Casey bicker. Casey's back to being mean to Morgan, even though he got him the job on the team. His best threatening line is, "You know it can take up to seven minutes to strangle someone? I've done it in under thirty seconds." Morgan's not that impressed, and instead makes Casey feel like a wimp for being too scared to ask for Morgan's help in finding Chuck. Morgan says he's been studying Chuck for more than twenty years so he knows a thing or two. He quickly figures out where Chuck is based on knowing he left his eczema prescription at home and would have had to fill one. That doesn't work, so they find him buying a copy of the latest issue of Justice League. Conveniently, Chuck has his destination showing on his train ticket: Zurich. Casey tells Morgan to pack, and Morgan gets all excited about traveling first class on the government's dime. Which, of course, means the next scene has Morgan and Casey crammed into coach next to someone holding a fussy baby. Casey wants to sleep, but Morgan believes he has to be awake rooting for the plane to stay aloft in order for it to actually do so. Casey puts in earplugs and tells Morgan if he wakes him, he'll be the only one who dies.
Sarah and Chuck are drinking coffee in their jammies, all cuddly the next morning (or so it seems) discussing how to take down Arnaldo and deliver him without revealing themselves. They're going to cuff him to something at the next station and call Interpol. They kiss, and Sarah wonders what the plan is, since all of their spy gear's in Paris. The plan, apparently, is for Sarah to sweet-talk a rocker and steal his handcuffs -- though those might not be for the spying so much as the sex; it's hard to tell with these two. Chuck grabs the cuffs from her and flashes on French so he can talk to a French skier with a hurt leg. He offers her a pillow and steals her painkillers. Back in their room, they get some Southern accent practice so they can fake like newlyweds for the terrorists. Chuck can't help but feel like they're missing something. Hmmm. What could they possibly be missing on a spy mission? The train stops.