Mercedes Mason (/meɪsɒn/; formerly Masöhn; born 1982/1983) is a Swedish-American actress known for playing the role of Zondra in the American television series Chuck and the role of Isabel Zambada in the American procedural drama The Finder. She starred in the 2011 American horror film Quarantine 2: Terminal. She played Louise Leonard in the 2012–13 American supernatural drama 666 Park Avenue and Talia Del Campo in NCIS: Los Angeles. She was a regular on AMC's television series Fear the Walking Dead from 2015 to 2017.
Mason was born in Linköping, Sweden, and grew up in the neighborhood of Ryd, Linköping. Her family originated in Iran, and she has one sister. She moved to the United States with her family at the age of 12. She was raised around the Chicago area.
Mason was one of two lead actresses in The Finder during its lone season in 2012. She played Deputy U.S. Marshal Isabel Zambada, the romantic interest of title character Walter Sherman (Geoff Stults). Both she and Maddie Hasson filled the void left by the departure of Saffron Burrows, the female lead in the series' backdoor pilot which was the 19th episode of Season 6 of Bones.