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IN: Justin Hartley
The "Smallville" alumnus is playing Patrick, the long-lost son Victoria (Madeleine Stowe, at left with Hartley) gave up for adoption when she was a teenager. His arrival at the Graysons' home in the Hamptons was teased in the Season 2 finale, but the audience didn't see his face. Suffice to say that the family is rather surprised to see him.