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Isobel Castille
Name: Isobel Castille
Alias(es): Izzy
Profession: FBI Agent
Rank: Special Agent in Charge, New York Field Office
Family: Robert Castille (father)
unnamed mother (deceased)
Marital status: Single
Status: Alive
Portrayed by: Alana De La Garza
First episode: FBI: Most Wanted

Isobel Castille is a Special Agent in Charge of the New York Field Office on FBI.


A.S.A.C. (Assistant Special Agent in Charge) Isobel Castille, Fugitive Squad Supervisor, polished and focused West Point graduate with a brief stint in Silicon Valley. She's a rising star who shuns politics and is a guided missile in the field. She was promoted to S.A.C. (Special Agent in Charge) of the New York Field Office.



Seasons Season 1Season 2Season 3Season 4Season 5
Current characters Maggie BellOmar Adom ZidanStuart ScolaTiffany WallaceIsobel CastilleJubal Valentine
Former characters Ellen SolbergDana MosierKristen Chazal