Dexter Clips, Photos from "Hello, Dexter Morgan"

For most of season four, Dexter Morgan has been stalking Arthur Mitchell, trying to understand (and the kill) his fellow mass murderer.

But on Sunday's new episode, the dangerous tables are turned, as the man referred to as "Trinity" asks Dexter over the phone: "What kind of man witnesses a child abduction and doesn't call the police?"

We know that answer, of course. Watch Arthur try to deduce it in the clip below, courtesy of the episode "Hello, Dexter Morgan."

What else can fans expect from the second-to-last episode of the season? Angel questions Christine and - mini-spoiler alert! - Arthur actually shows up at the Miami PD headquarters.

Click on the photos below to enlarge scenes from the installment; follow this article's jump to view another clip; and remember to return to TV Fanatic every Monday morning for the latest Dexter quotes, recaps and reviews...