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Cuddy (Lisa Edelstein) assigns House (Hugh Laurie) to treat John Kelley (Marc Blucas), an Iraq war veteran who may or may not be suffering from Gulf War Syndrome--and who happens to be the nephew of one of the clinic's biggest donors. This proves to be a major freak-out for House: He's been having a recurring nightmare in which the principal character is a Marine who looks just like Kelley! As if this wasn't enough for him to worry about, House's leg pains are getting worse by the hour. Meanwhile, Cameron (Jennifer Morrison) and Chase (Jesse Spencer) are caught in the act while engaging in "uncomplicated sex".