'Homeland' set in Germany for 5th season

"Homeland" will be set in Germany in the fifth season, Showtime announced a little while ago.. The details: 

"Beginning production in early June at the famed Studio Babelsberg in Berlin, HOMELAND will become the first American television series to shoot a full season entirely in Germany. Season five will pick-up two years after Carrie Mathison’s (Claire Danes) ill-fated tenure as Islamabad station chief. Struggling to reconcile her guilt and disillusionment with years of working on the front lines in the “war on terror,” Carrie finds herself in a self-imposed exile in Berlin, estranged from the CIA and working for a private security firm. HOMELAND’s 12-episode season will premiere this fall on SHOWTIME. "

 Yes, indeed: Unusual. American series simply don't set up shop in Germany as a matter of course, or in any European country for that matter -- with costs being largely prohibitive and languages acting as barriers.  But a German setting certainly offers intriguing story possibilities, particularly after last season's soft landing, with Carrie attempting to assuage that aforementioned guilt and disillusionment.

Why "self-exile" to Germany? Therein apparently lies a whole season...