Declan's actually upstairs when he hears the knock and he wonders who it might be. With Druitt on the island now, the chance it's Magnus in need of help or Will is pretty high and he thinks they'd knock. Kate, though, is a surprise because he wouldn't have expected her to knock at all.

"You didn't have to knock," he says with a grin, tugging the door inward so he can welcome her inside. "Door's always open for you."