The Astronaut Wives Club is an American period drama television series developed by Stephanie Savage for ABC . Yvonne Strahovski . She is best known for her roles as CIA Agent Sarah Walker in the NBC series Chuck ( 2007 -- 2012 ) , Hannah McKay in the Showtime series Dexter ( 2012 -- 2013 ) and CIA Agent Kate Morgan in the Fox limited event television series 24 : Live Another Day ( 2014 ) .
Yvonne Strahovski worked on an ABC marketing campaign.