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As for Sean, his newborn son Conor's hand deformity leads to a disagreement with Julia (Joely Richardson) over corrective surgery. Meanwhile, Michelle is harassed (and blackmailed) by a former boss of her own, a mysterious woman named James (Jacqueline Bisset), who has ties to Sean and Christian's old enemy, drug kingpin Escobar Gallardo (Robert LaSardo). This haunts Christian, and he soon becomes emotionally intimate with physician Michelle Landau (Sanaa Lathan), the trophy wife of old and ailing venture capitalist Burt Landau (Larry Hagman), who buys McNamara/Troy and installs her as Christian and Sean's boss.
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Season 4, the last in Miami for Christian and Sean (Julian McMahon and Dylan Walsh), opens with a celebration: their 5000th surgery together.\ Out of the operating room, Christian's shrink (Brooke Shields), who's obsessed with him, tells him that his fear of emotional intimacy stems from a desire to be more than a friend and colleague to Sean.
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