Stoll will play Sandy Bachman, the CIA Chief of Station in Pakistan and a rising star in the agency’s firmament, while Robins will join the cast as Martha Boyd, the U.S. Ambassador to Pakistan, who is "professional and put together, with a ship-to-ship voice and personality to match."
The drama's fourth season will begin production later this month in Cape Town, South Africa for a fall 2014 premiere.
Season 4 will find Carrie (Claire Danes) assigned to one of the most volatile and dangerous CIA stations in the Middle East where she is back on the front lines in the war on terror.
Along with Danes, Mandy Patinkin and Rupert Friend will return for the upcoming season, as well as Nazanin Boniadi, who was recently promoted to a series regular. Meanwhile, Morena Baccarin and Morgan Saylor -- who play Jessica and Dana Brody, respectively -- will not be returning as regulars next season.
Stoll can be seen in the lead role in FX’s upcoming vampire drama, “The Strain," which premieres on July 13. Besides his Golden Globe nominated role in Netflix's "House of Cards," Stoll's other credits include the film "Midnight in Paris" and the short-lived TV spin-off "Law & Order: LA." Robins' TV credits include "The Sopranos," "In Treatment," "All My Children" and "Witchblade."