Cara Buono has joined the cast of Person of Interest.
The Emmy-nominated actress will star as a femme fatale on the CBS show's fourth season, according to Deadline.
Buono is best known for playing Dr Faye Miller in Mad Men.
She has also guest starred in The Good Wife, Elementary and Brother & Sisters.
Person of Interest returns on Tuesday, September 23 on CBS.
Watch the trailer for Person of Interest season three below:
