Will the truth finally come out on this Sunday's Homeland?

Following a fascinating, character-revealing episode of this Showtime drama, the CIA will take major action on "The Good Soldier." Look for the agency to issue polygraph tests on everyone who came into contact with Nazir's terrorist pal last week. Including Brody.

Carrie, as you might expect, will be anxious to see these results. View the official Showtime preview for the episode now:

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