Bored to Death's Laila Robins and House of Cards' Corey Stoll have joined the cast of Homeland for season four. reports that Robins will play Martha Boyd, the United States Ambassador to the Islamic Republic of Pakistan.

Stoll will play Sandy Bachman, the CIA Chief of Station in Pakistan.

US network Showtime has said that season four will find Carrie Mathison (Claire Danes) "assigned to one of the most volatile and dangerous CIA stations in the Middle East".