Can anyone explain the meaning of "Is it now" to me? I googled this phrase, but I couldn't find the answer out...I heard this from a TV show:
Maggie: Mail's here, telephone bill, letter from your mother, "Simone's of Siyasi Sexy Sleepwear"
Jason: Mmmm. Wonder how we got this.
Maggie: Mmm. I don't know. Could it be because it's addressed to a Doctor Jason Seaver?
Jason: Is it now. You know I've been getting this darn junk mail ever since I sent away for "Slim Whitman's Greatest Hits".
Source: Growing Pains script