Dexter fans seem split on the addition of Julia Stiles as Lumen this season. Where do you stand?

After this week's installment of the Showtime series - reviewed by TV Fanatic HERE - one thing seems certain: this character isn't going away any time soon. Quite the opposite, in fact, as "Circle Us" concluded with her actually meeting Harrison.

Taking a peek ahead, meanwhile, Lumen will continue to work with Dexter, as the official Showtime preview for "Take It" gives us a look at the latter at a Jordan Chase seminar, continuing to plot revenge. See for yourself:

We've also included a clip from the episode, as Lumen gives Dexter intel on Cole. He sounds like a dangerous man...

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.