When CSI: NY heads to San Francisco for an early October episode, the gang will be joined by a former thirtysomething fave. Peter Horton, who played thirtysomething's Gary, has been cast as a California-based FBI agent who once dated Jo (Sela Ward).
While visiting New York, Horton's character will reconnect with Jo and help her and Mac (Gary Sinise) with a case that concludes in the City by the Bay.
Source: TV Guide
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