Oh, she has a sense of humor...but we don't see it here in this episode any more than when Ivanova first came in, because both are in new situations and that requires a certain degree of seriousness. We'll see some of her humor along the way...it's also different from Ivanova's, more a sly kind of humor, the sort that slips past you and ricochets around the corner half an hour later to nail you between the eyes.
