Despite the implication of the title, “The Litvinov Ruse” is no trick. It's the best episode of Homeland's fifth season. Etai (Allan Corduner) appears briefly only so that he might not only reunite Carrie (Claire Danes) and Saul (Mandy Patinkin), but help them to reconcile. (“Both our hearts were broken,” Carrie says of the rift that developed after she refused to support Saul's bid for the CIA directorship, and Etai asks her to be more graceful: “Yes, but his is older. Weaker.”) After the two share a much-needed and heartfelt hug, Homeland jumps back to its winning formula: Carrie and Saul together, looking for evidence that a red-haired American is a traitor.