Marsha Thomason
as Diana Barrigan (81 episodes)
Marsha Thomason portrays Diana Barrigan, an FBI agent and a member of Peter Burke's team. Diana is highly skilled, intelligent, and resourceful. She often collaborates closely with Peter and Neal, using her expertise in an array of areas to help solve intricate cases. Diana's character brings a strong and capable presence to the show.
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Most popular actor on White Collar
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