Mercedes Mason (/meɪsɒn/; born Masöhn, born 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 also had a small role in the Castle episode "He's Dead, She's Dead". She portrays Captain Zoe Andersen on The Rookie.