In a preview for Sunday’s episode of “Homeland,” we find Carrie attempting to make amends for last week’s botched Operation Walker Catch. As she apologizes to the mosque’s Imam for the loss of lives, we soon discover her real reason for returning: why Walker chose the mosque as an escape route. Does the Imam have more information than he’s letting on to? And what will it take for him to admit what he knows? “Homeland” airs Sundays at 10/9c on Showtime. as an escape route.