"That said, they need to keep in mind that this isn't How I Met Your Mother or one of those other shows where the nominal lead could fall off the planet and it might take a couple of months before anyone noticed. There's a reason that the audience for this show isn't watching Hawaii Five-O instead, and if you're nice to that reason, he might let you call him 'Captain.'"From The AV Club. They also make a nice point about Castle playing damsel in distress. Bonus points for a 39 Steps reference, too!